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EP0531221A1 - Method for modifying or flavoring primary or sidestream smoke of smoking articles - Google Patents

Method for modifying or flavoring primary or sidestream smoke of smoking articles Download PDF

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Publication number
EP0531221A1
EP0531221A1 EP92402421A EP92402421A EP0531221A1 EP 0531221 A1 EP0531221 A1 EP 0531221A1 EP 92402421 A EP92402421 A EP 92402421A EP 92402421 A EP92402421 A EP 92402421A EP 0531221 A1 EP0531221 A1 EP 0531221A1
Authority
EP
European Patent Office
Prior art keywords
solvent
products
modifying
flavoring
glycol
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92402421A
Other languages
German (de)
French (fr)
Other versions
EP0531221B1 (en
Inventor
Jean-Claude Battard
Daniel Esnault
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe Nationale dExploitation Industrielle des Tabacs et Allumettes SAS
Original Assignee
Societe Nationale dExploitation Industrielle des Tabacs et Allumettes SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Societe Nationale dExploitation Industrielle des Tabacs et Allumettes SAS filed Critical Societe Nationale dExploitation Industrielle des Tabacs et Allumettes SAS
Publication of EP0531221A1 publication Critical patent/EP0531221A1/en
Application granted granted Critical
Publication of EP0531221B1 publication Critical patent/EP0531221B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D1/00—Cigars; Cigarettes
    • A24D1/02—Cigars; Cigarettes with special covers
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/282—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by indirect addition of the chemical substances, e.g. in the wrapper, in the case

Definitions

  • the present invention relates to a process for modifying or flavoring primary or secondary smoke resulting from the combustion of one or more components used in the composition of smoking products, whether or not based on tobacco, such as cigarettes, cigars and the like. as well as the mixture of components, intended to be smoked, for example in a pipe or in the form of a cigarette, by applying to the envelope of these products a solution of flavoring or modifying substances which are transferred to the product in the vapor phase in the confined atmosphere of the packaging of these products.
  • envelope either the envelope of the product like the paper of the tobacco tobacco sausage of the cigarette or the cap or the under-cap of the cigar, or the support constituting the packaging itself of the product to be smoked that is ie the label or cardboard case of the package in direct contact with the smoking mixture or the aluminum combination generally wrapping cigarettes.
  • the invention aims to apply the process to any desired aromatic or modifying substance, volatile at room temperature, and thus to produce products with different taste characteristics from the same smoking mixture.
  • extracts of spices such as cinnamon, nutmeg, cloves; flowers, such as acacia, jasmine rose; fruit extracts like lime, orange, cherry, apricot and identical or different natural aromatic molecules such as benzaldehyde, menthol, anisol, carvone, anethole.
  • the invention provides for using as solvent a non-volatile product at room temperature having a vapor pressure lower than that of the aromatic substance to be deposited.
  • the solution obtained makes it possible to maintain the aromatic substances in solvated form on the paper until the moment of their transfer from the envelope to the product to be smoked in the confined atmosphere.
  • the solvent will have a vapor pressure below 10 ⁇ 1 mm Hg at 20 degrees C or a boiling point above 180 degrees C.
  • a gravure process it has been found that good results are obtained when the viscosity of the solution is greater than 20 centipoise.
  • the flavoring according to the invention is simple to implement, economical in raw material, usable for the manufacture of small series of products having different aromatic notes.
  • the flavor is transferred to the material of the smoking product in the gas phase.
  • Smoking reveals significant differences compared to the same product to which the same flavor has been added by methods known from the prior art (spraying or soaking with an alcoholic and / or aqueous solution or emulsion ).
  • 300 g of aromatic solution are prepared by dissolving 40 g of menthol and 30 g of vanillin in 230 g of anethole.
  • the solution obtained has a dynamic viscosity of 5 centipoise.
  • This solution is applied to the muslin of an aluminum combination by rotogravure printing at a rate of 3.5 g / m2.
  • the coated handset is immediately wound up in the form of ready-to-use reels on a packaging machine. After three months of storage in airtight plastic packaging, packages were made with this handset and cigarettes made with an un-sauced blond mixture.
  • 150 g of coffee oleoresin and 150 g of a coffee flavor from the company ARALCO are mixed.
  • the mixture which has a viscosity of more than 100 centipoise, is added to 100 g of propylene glycol.
  • the tripe is not initially flavored, experts judge the smoke of these products typed in the noted coffee with a slight aromatic bitterness.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacture Of Tobacco Products (AREA)
  • Cigarettes, Filters, And Manufacturing Of Filters (AREA)
  • Seasonings (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)

Abstract

The subject of the invention is a process intended for modifying or flavouring the primary or secondary smoke of smoking articles such as cigarettes, cigars and similar articles as well as the mixture intended for smoking, for example in a pipe or in the form of a cigarette, by applying to the wrapping of these articles at least one solution of the flavouring or modifying substances which are transferred to the article in the vapour phase in the confined atmosphere of the packaging of these articles. According to the invention, a product which is nonvolatile at room temperature and has a vapour pressure less than that of the flavouring substance to be deposited is used as solvent.

Description

La présente invention concerne un procédé destiné à modifier ou à aromatiser la fumée primaire ou secondaire résultant de la combustion d'un ou plusieurs composants entrant dans la composition de produits à fumer à base ou non de tabac, tels que cigarettes, cigares et produits analogues ainsi que le mélange de composants, destiné à être fumé, par exemple dans une pipe ou sous forme d'une cigarette, en appliquant sur l'enveloppe de ces produits une solution des substances aromatisantes ou modificatrices qui sont transférées sur le produit en phase vapeur dans l'atmosphère confinée de l'emballage de ces produits.The present invention relates to a process for modifying or flavoring primary or secondary smoke resulting from the combustion of one or more components used in the composition of smoking products, whether or not based on tobacco, such as cigarettes, cigars and the like. as well as the mixture of components, intended to be smoked, for example in a pipe or in the form of a cigarette, by applying to the envelope of these products a solution of flavoring or modifying substances which are transferred to the product in the vapor phase in the confined atmosphere of the packaging of these products.

Il faut comprendre par enveloppe, soit l'enveloppe du produit comme le papier du boudin tabac de la cigarette ou la cape ou la sous-cape du cigare, soit le support constituant l'emballage lui-même du produit à fumer c'est-à-dire l'étiquette ou étui carton du paquet en contact direct avec le mélange à fumer ou le combiné aluminium enveloppant en général les cigarettes.It is necessary to understand by envelope, either the envelope of the product like the paper of the tobacco tobacco sausage of the cigarette or the cap or the under-cap of the cigar, or the support constituting the packaging itself of the product to be smoked that is ie the label or cardboard case of the package in direct contact with the smoking mixture or the aluminum combination generally wrapping cigarettes.

On connaît déjà des procédés de ce type mais dans lesquels la substance aromatisante est toujours le menthol fondu ou une solution alcoolique ou aqueuse.Processes of this type are already known but in which the flavoring substance is always molten menthol or an alcoholic or aqueous solution.

L'invention vise à appliquer le procédé à toute substance aromatique ou modificatrice désirée, volatile à la température ambiante, et à réaliser ainsi des produits à caractéristiques gustatives différentes à partir d'un même mélange à fumer.The invention aims to apply the process to any desired aromatic or modifying substance, volatile at room temperature, and thus to produce products with different taste characteristics from the same smoking mixture.

A titre d'exemple non limitatif de telles substances, on peut citer les extraits d'épices tels que cannelle, noix de muscade, clou de girofle ; de fleurs, telles que acacia, rose jasmin ; des extraits de fruits comme la limette, l'orange, la cerise, l'abricot et des molécules aromatiques natures identiques ou non telles que la benzaldéhyde, le menthol, l'anisol, la carvone, l'anéthol.By way of nonlimiting example of such substances, mention may be made of extracts of spices such as cinnamon, nutmeg, cloves; flowers, such as acacia, jasmine rose; fruit extracts like lime, orange, cherry, apricot and identical or different natural aromatic molecules such as benzaldehyde, menthol, anisol, carvone, anethole.

Pour obtenir le résultat recherché l'invention prévoit d'utiliser comme solvant un produit non volatil à la température ambiante ayant une tension de vapeur inférieure à celle de la substance aromatique à déposer.To obtain the desired result, the invention provides for using as solvent a non-volatile product at room temperature having a vapor pressure lower than that of the aromatic substance to be deposited.

De cette façon, la solution obtenue permet de maintenir les substance aromatiques sous forme solvatée sur le papier jusqu'au moment de leur transfert de l'enveloppe sur le produit à fumer dans l'atmosphère confinée.In this way, the solution obtained makes it possible to maintain the aromatic substances in solvated form on the paper until the moment of their transfer from the envelope to the product to be smoked in the confined atmosphere.

De préférence le solvant aura une tension de vapeur inférieure à 10⁻¹ mm de Hg à 20 degrés C ou un point d'ébulllition supérieur à 180 degrés C.Preferably the solvent will have a vapor pressure below 10⁻¹ mm Hg at 20 degrees C or a boiling point above 180 degrees C.

On obtient de très bon résulats en employant comme solvant un produit hydroxylé ou polyhydroxylé, seul ou en mélange par exemple :

  • le propylène glycol ;
  • le triethylène glycol ;
  • le butylène glycol ;
  • un polyéthylène glycol ;
  • un polypropylène glycol.
Very good results are obtained by using a hydroxylated or polyhydroxylated product, alone or as a mixture, for example:
  • propylene glycol;
  • triethylene glycol;
  • butylene glycol;
  • polyethylene glycol;
  • polypropylene glycol.

D'une manière préférée, on choisira de déposer la solution par un procédé d'héliogravure. Dans ce cas, on a constaté qu'on obtenait de bons résultats lorsque la viscosité de la solution était supérieure à 20 centipoises.Preferably, one will choose to deposit the solution by a gravure process. In this case, it has been found that good results are obtained when the viscosity of the solution is greater than 20 centipoise.

Dans une variante de mise en oeuvre du procédé, on peut effectuer des dépôts de solutions aromatiques ou modificatrices différentes, ces solutions étant ou non compatibles entre elles. On peut alors notamment utiliser un procédé d'héliogravure dit en transfert repéré consistant à déposer sur des surfaces limitées, contiguës ou non ou se recouvrant éventuellement totalement ou partiellement, successivement deux ou plusieurs solutions.In a variant implementation of the process, it is possible to deposit different aromatic or modifying solutions, these solutions being or not compatible with each other. It is therefore possible in particular to use a rotogravure process known as spotted transfer consisting of depositing on limited surfaces, contiguous or not or possibly overlapping completely or partially, successively two or more solutions.

L'aromatisation selon l'invention est simple à mettre en oeuvre, économe en matière première, utilisable pour la fabrication de petites séries de produits ayant des notes aromatiques différentes. Le transfert de l'arôme sur la matière du produit à fumer se fait en phase gazeuse. Le fumage révèle des différences sensibles par rapport au même produit sur lequel on a ajouté le même arôme par les procédés connus de l'art antérieur (pulvérisation ou trempage à l'aide d'une solution ou d'une émulsion alcoolique et/ou aqueuse).The flavoring according to the invention is simple to implement, economical in raw material, usable for the manufacture of small series of products having different aromatic notes. The flavor is transferred to the material of the smoking product in the gas phase. Smoking reveals significant differences compared to the same product to which the same flavor has been added by methods known from the prior art (spraying or soaking with an alcoholic and / or aqueous solution or emulsion ).

A titre nullement limitatif, on donne ci-après quelques exemples de mise en oeuvre de l'invention.By way of non-limiting example, some examples of implementation of the invention are given below.

Exemple 1Example 1

On prépare 300 g de solution aromatique en solubilisant 40 g de menthol et 30 g de vanilline dans 230 g d'anéthol.300 g of aromatic solution are prepared by dissolving 40 g of menthol and 30 g of vanillin in 230 g of anethole.

La solution obtenue a une viscosité dynamique de 5 centipoises. On ajoute à cette solution un mélange de 100 g, à poids égal, de deux polyéthylènes glycol de marque Lutrol, fabriqués par BASF et référencés respectivement E 400 et E 1500.The solution obtained has a dynamic viscosity of 5 centipoise. To this solution is added a mixture of 100 g, on an equal weight basis, of two Lutrol brand polyethylene glycols, manufactured by BASF and referenced E 400 and E 1500 respectively.

On obtient 400 g d'une solution de viscosité égale à 20 centipoises.400 g of a solution with a viscosity equal to 20 centipoise are obtained.

On applique cette solution sur la mousseline d'un combiné aluminium par impression héliogravure à raison de 3,5 g/m2. Le combiné enduit est immédiatement enroulé sous forme de bobines prêtes à l'emploi sur machine de paquetage. Après trois mois de stockage dans un emballage plastique étanche, on a confectionné des paquets avec ce combiné et des cigarettes fabriquées avec un mélange blond non saucé.This solution is applied to the muslin of an aluminum combination by rotogravure printing at a rate of 3.5 g / m2. The coated handset is immediately wound up in the form of ready-to-use reels on a packaging machine. After three months of storage in airtight plastic packaging, packages were made with this handset and cigarettes made with an un-sauced blond mixture.

Après une attente de quinze jours, les paquets ont été ouverts et les cigarettes remises à un panel de dégustation. Globalement, l'arôme de la fumée a été jugé typé dans la note anisée avec une saveur sucrée, fraîche et douce.After a fortnight's wait, the packages were opened and the cigarettes given to a tasting panel. Overall, the aroma of the smoke was found to be distinctive in the anise note with a sweet, fresh and sweet flavor.

Exemple 2Example 2

On mélange 300 g d'essence de cannelle dans 100 g de solvants identiques à l'exemple 1. La solution obtenue est déposée par les mêmes moyens sur du papier à cigarette de 25 g/m2 de grammage à raison de 2 g/m2. Les cigarettes, fabriquées avec ce papier et un mélange de tabac blond sans sauce, sont soumises quelques jours aprés confection à un panel de dégustateurs. L'arôme de la fumée est jugé typé dans la note épicée cannelle avec une saveur douce et sucrée.300 g of cinnamon essence are mixed in 100 g of solvents identical to Example 1. The solution obtained is deposited by the same means on cigarette paper of 25 g / m2 grammage at the rate of 2 g / m2. The cigarettes, made with this paper and a mixture of blond tobacco without sauce, are submitted a few days after making to a panel of tasters. The aroma of the smoke is deemed to be distinctive in the spicy cinnamon note with a sweet and sweet flavor.

Exemple 3Example 3

On mélange 150 g d'oléorésine de café et 150 g d'un arôme café de la Société ARALCO. Le mélange, qui a une viscosité de plus de 100 centipoises, est ajouté à 100 g de propylène glycol. On obtient une solution développant 40 centipoises qui est déposée, à raison de 8 g/m2, par impression héliogravure sur une bande de tabac reconstitué de 120 m d'épaisseur, destinée à la confection de sous-capes de poupées de cigares. Bien que la tripe ne soit pas initialement aromatisée, les experts jugent la fumée de ces produits typée dans la noté café avec une légère amertume aromatique.150 g of coffee oleoresin and 150 g of a coffee flavor from the company ARALCO are mixed. The mixture, which has a viscosity of more than 100 centipoise, is added to 100 g of propylene glycol. We obtain a solution developing 40 centipoise which is deposited, at a rate of 8 g / m2, by rotogravure printing on a strip of reconstituted tobacco 120 m thick, intended for the manufacture of cigar dolls' undercoats. Although the tripe is not initially flavored, experts judge the smoke of these products typed in the noted coffee with a slight aromatic bitterness.

Claims (7)

Procédé destiné à modifier ou à aromatiser la fumée primaire ou secondaire des produits à fumer, tels que cigarettes, cigares et produits analogues ainsi que le mélange destiné à être fumé, par exemple dans une pipe ou sous forme d'une cigarette, en appliquant sur l'enveloppe de ces produits au moins une solution des substances aromatisantes ou modificatrices qui sont transférées sur le produit en phase vapeur dans l'atmosphère confinée de l'emballage de ces produits, caractérisé par le fait qu'on utilise, comme solvant, un produit non volatil à la température ambiante ayant une tension de vapeur inférieure à celle de la substance aromatique à déposer.Process for modifying or flavoring the primary or secondary smoke of smoking products, such as cigarettes, cigars and similar products, as well as the mixture intended to be smoked, for example in a pipe or in the form of a cigarette, by applying to the envelope of these products at least one solution of flavoring or modifying substances which are transferred to the product in the vapor phase in the confined atmosphere of the packaging of these products, characterized in that a solvent is used non-volatile product at room temperature having a vapor pressure lower than that of the aromatic substance to be deposited. Procédé selon la revendication 1 dans lequel le solvant a une tension de vapeur inférieure à 10⁻¹ mm Hg.The method of claim 1 wherein the solvent has a vapor pressure of less than 10⁻¹ mm Hg. Procédé selon la revendication 1 ou 2 dans lequel le solvant a un point d'ébullition supérieur à 180 degrés C.The process according to claim 1 or 2 wherein the solvent has a boiling point above 180 degrees C. Procédé selon la revendication 1 dans lequel le solvant est choisi parmi le propylène glycol, triethylène glycol, butylène glycol, polyéthylène glycol et polypropylène glycol.Process according to Claim 1, in which the solvent is chosen from propylene glycol, triethylene glycol, butylene glycol, polyethylene glycol and polypropylene glycol. Procédé selon la revendication 4 dans lequel le solvant est un mélange desdits produits.The method of claim 4 wherein the solvent is a mixture of said products. Procédé selon l'une des revendication 1 à 5 dans lequel les solutions sont déposées sur l'enveloppe du produit à fumer par héliogravure.Method according to one of claims 1 to 5 wherein the solutions are deposited on the envelope of the smoking product by gravure printing. Procédé selon la revendication 5 dans lequel la viscosité des solutions est au moins égale à 20 centipoises.The method of claim 5 wherein the viscosity of the solutions is at least 20 centipoise.
EP92402421A 1991-09-05 1992-09-04 Method for modifying or flavoring primary or sidestream smoke of smoking articles Expired - Lifetime EP0531221B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110991 1991-09-05
FR9110991A FR2680952B1 (en) 1991-09-05 1991-09-05 PROCESS FOR MODIFYING OR FLAVORING PRIMARY OR SECONDARY SMOKE OF SMOKING PRODUCTS.

Publications (2)

Publication Number Publication Date
EP0531221A1 true EP0531221A1 (en) 1993-03-10
EP0531221B1 EP0531221B1 (en) 1996-12-11

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ID=9416666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402421A Expired - Lifetime EP0531221B1 (en) 1991-09-05 1992-09-04 Method for modifying or flavoring primary or sidestream smoke of smoking articles

Country Status (10)

Country Link
US (1) US5615694A (en)
EP (1) EP0531221B1 (en)
JP (1) JP3320789B2 (en)
AT (1) ATE146045T1 (en)
DE (1) DE69215803T2 (en)
DK (1) DK0531221T3 (en)
ES (1) ES2094890T3 (en)
FR (1) FR2680952B1 (en)
GR (1) GR3022181T3 (en)
OA (1) OA09762A (en)

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WO2002035948A1 (en) 2000-11-06 2002-05-10 Japan Tobacco Inc. Perfume compositions for deodorizing tobacco, tobacco deodorizing agents and cigarette and tobacco packages with little side smoke flow odor
EP1154930B1 (en) * 1999-02-17 2003-08-13 British American Tobacco (Investments) Limited Packaging smoking articles

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US5901710A (en) * 1997-10-30 1999-05-11 Barber; Michael Cigar enhancing humidor
US6053175A (en) * 1998-03-03 2000-04-25 D'angelo; Carmen A. Method for treating smoking article
AU6726600A (en) * 1999-08-31 2001-03-26 Japan Tobacco Inc. Method of fixing perfume for improving odor of secondary smoke from cigarette and cigarette
US7604008B2 (en) * 2003-10-03 2009-10-20 Remberto Andres Estrella Gomez Smoking kit for customizing a tobacco product
US8015979B2 (en) * 2007-02-08 2011-09-13 Cooper Jack B Cigar
US9788569B2 (en) 2007-02-08 2017-10-17 Jack B. Cooper Cigar flavoring method
US20090314300A1 (en) * 2007-02-08 2009-12-24 Cooper Jack B Novel Cigar
GB0818810D0 (en) * 2008-10-14 2008-11-19 British American Tobacco Co Smoking article
GB2475856A (en) * 2009-12-02 2011-06-08 British American Tobacco Co Flavoured plugwrap
EP2742813A1 (en) 2012-12-11 2014-06-18 Scandinavian Tobacco Group Lummen N.V. A smoking article, such as a cigar, with flavoured mouthpiece and method for manufacturing such article
EP3212015B1 (en) 2014-10-30 2023-10-04 Perfec Cigar Solutions, Inc. Cigar airflow adjustment instrument
CN105876852B (en) * 2016-06-13 2017-04-12 四川三联卷烟材料有限公司 Production method of thermal-induced fragrance-holding filter rod
KR102436227B1 (en) * 2020-05-29 2022-08-24 주식회사 케이티앤지 Functional material coated tip paper for smoking articles and method for coating the tip pape

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Cited By (6)

* Cited by examiner, † Cited by third party
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EP1154930B1 (en) * 1999-02-17 2003-08-13 British American Tobacco (Investments) Limited Packaging smoking articles
AP1339A (en) * 1999-02-17 2004-12-08 British American Tobacco Investments Ltd Packaging smoking articles
WO2002035948A1 (en) 2000-11-06 2002-05-10 Japan Tobacco Inc. Perfume compositions for deodorizing tobacco, tobacco deodorizing agents and cigarette and tobacco packages with little side smoke flow odor
EP1336345A1 (en) * 2000-11-06 2003-08-20 Japan Tobacco Inc. Perfume compositions for deodorizing tobacco, tobacco deodorizing agents and cigarette and tobacco packages with little side smoke flow odor
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EP1336345B1 (en) * 2000-11-06 2009-10-21 Japan Tobacco Inc. Perfume compositions for deodorizing tobacco, tobacco deodorizing agents and cigarette and tobacco packages with little side smoke flow odor

Also Published As

Publication number Publication date
JP3320789B2 (en) 2002-09-03
OA09762A (en) 1993-11-30
ATE146045T1 (en) 1996-12-15
ES2094890T3 (en) 1997-02-01
EP0531221B1 (en) 1996-12-11
FR2680952B1 (en) 1994-05-20
US5615694A (en) 1997-04-01
DK0531221T3 (en) 1997-05-26
DE69215803T2 (en) 1997-06-19
JPH06225745A (en) 1994-08-16
FR2680952A1 (en) 1993-03-12
DE69215803D1 (en) 1997-01-23
GR3022181T3 (en) 1997-03-31

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