CN2423660Y - Manufacturing equipment for positive material of lithium ion battery - Google Patents
Manufacturing equipment for positive material of lithium ion battery Download PDFInfo
- Publication number
- CN2423660Y CN2423660Y CN00234459U CN00234459U CN2423660Y CN 2423660 Y CN2423660 Y CN 2423660Y CN 00234459 U CN00234459 U CN 00234459U CN 00234459 U CN00234459 U CN 00234459U CN 2423660 Y CN2423660 Y CN 2423660Y
- Authority
- CN
- China
- Prior art keywords
- shower nozzle
- reactor
- material feed
- charge pipe
- blender
- 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.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 title claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 239000010405 anode material Substances 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 239000007921 spray Substances 0.000 abstract description 13
- 239000013078 crystal Substances 0.000 abstract description 9
- 230000002950 deficient Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 239000003513 alkali Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- 239000002994 raw material Substances 0.000 description 10
- IDSMHEZTLOUMLM-UHFFFAOYSA-N [Li].[O].[Co] Chemical compound [Li].[O].[Co] IDSMHEZTLOUMLM-UHFFFAOYSA-N 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- CPABIEPZXNOLSD-UHFFFAOYSA-N lithium;oxomanganese Chemical compound [Li].[Mn]=O CPABIEPZXNOLSD-UHFFFAOYSA-N 0.000 description 5
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 5
- 238000005979 thermal decomposition reaction Methods 0.000 description 5
- 229910012820 LiCoO Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229910015645 LiMn Inorganic materials 0.000 description 3
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 3
- 150000001868 cobalt Chemical class 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 3
- 229910003002 lithium salt Inorganic materials 0.000 description 3
- 159000000002 lithium salts Chemical class 0.000 description 3
- 150000002696 manganese Chemical class 0.000 description 3
- 239000000320 mechanical mixture Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000002815 nickel Chemical class 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229940044175 cobalt sulfate Drugs 0.000 description 2
- 229910000361 cobalt sulfate Inorganic materials 0.000 description 2
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- INHCSSUBVCNVSK-UHFFFAOYSA-L lithium sulfate Inorganic materials [Li+].[Li+].[O-]S([O-])(=O)=O INHCSSUBVCNVSK-UHFFFAOYSA-L 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- RBTVSNLYYIMMKS-UHFFFAOYSA-N tert-butyl 3-aminoazetidine-1-carboxylate;hydrochloride Chemical compound Cl.CC(C)(C)OC(=O)N1CC(N)C1 RBTVSNLYYIMMKS-UHFFFAOYSA-N 0.000 description 2
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910013292 LiNiO Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229940011182 cobalt acetate Drugs 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- XIXADJRWDQXREU-UHFFFAOYSA-M lithium acetate Chemical compound [Li+].CC([O-])=O XIXADJRWDQXREU-UHFFFAOYSA-M 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- Y02E60/122—
Landscapes
- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model relates to a manufacturing device for positive pole materials of lithium ion batteries, comprising a material feed groove, a reaction kettle, a centrifugal machine, and a thermal resolver. The material feed groove is connected with material feed pipes so as to be led into the reaction kettle, and pressure boosting pumps are arranged on the material feed pipes. The end head of each of the material feed pipes which are arranged in the reaction kettle is provided with spray heads, wherein, one spray head is arranged at the lower part of the reaction kettle, and the spray heads which are arranged at the upper part of the reaction kettle face upwards. Spray heads which are arranged on other material feed pipes are arranged at the upper part of the material feed pipes, and the spray heads which are arranged on other material feed pipes face downwards. A material outlet of the reaction kettle is arranged on a machine wall which is arranged above the upper spray heads of the material feed pipes, and a pipeline which is led to the inner part of the centrifugal machine is arranged on the material outlet. The centrifugal machine is connected with the thermal resolver. Positive pole materials manufactured by the utility model have the distinctive characteristics of reasonable crystal size, defective crystals, high electrochemical activity, stable crystal forms, etc.
Description
The utility model relates to a kind of manufacturing installation of anode material for lithium-ion batteries.Specifically a kind of device of making high performance lithium ion battery anode material.
The lithium ion anode material of commercialization has lithium cobalt oxygen (LiCoO
2), lithium nickel oxygen (LiNiO
2), lithium manganese oxygen (LiMn
2O
4) wait severally, they are positive active materials of lithium ion chargeable battery, its performance directly determines the capacity and the serviceability of lithium ion chargeable battery.Since initial stage, countries in the world center on synthesizes them, and improves its performance and carried out big quantity research, studies carefully its manufacture method and mainly contains two classes from the nineties:
One class is the solid phase thermal synthesis method, and with their carbonate or with their hydroxide, or with their oxide, by the stoichiometric ratio mechanical mixture, at high temperature calcination forms then.Adopting LiOH and CoO as Sony corporation of Japan is that raw material is made LiCoO 700 ℃ of calcinations
2, Gumman etc. adopt Li
2CO
3, CoCO
3Be raw material, at 400 ℃ of synthetic LiCoO
2, human LiOHH such as Japanese Shuji Yamada
2O and Ni (OH)
2By Li/Ni=1: 1 carries out mechanical mixture, then at 500 ℃-900 ℃ preparation LiNiO down
2
The characteristics of these class methods are to decompose to synthesize positive electrodes such as lithium cobalt oxygen, lithium nickel oxygen, lithium manganese oxygen by elevated temperature heat, and method is simple, and flow process is short.Phenomenons such as shortcoming is that these class methods are to use solid material, through at high temperature coming sintetics by solid-state diffusion between particle and particle after the mechanical mixture, therefore, can not evenly mix, and synthetic product exists crystal formation irregular, and particle characteristics is not good.Because adopt the characteristic of the synthetic product of these class methods such as the particle characteristics that particle size distribution, purity and proportion etc. depend on raw material itself, the particle size of raw material, distribution, proportion and purity have determined characteristics such as the particle size distribution, proportion of final products, so the granularity of product and performance can not be stablized control, random big, most cases is that particle size distribution is wide, proportion is little, electrochemistry capacitance is low, the product homogeneity is poor.
Another kind of is liquid phase synthesizing method, and people such as R.Yazami have studied a kind of low-temperature synthetic method.Under brute force stirs, cobalt acetate suspension is added in the lithium acetate solution, to handle at least 2 hours down at 550 ℃ then, resultant material has the monodisperse particles shape, bigger serface, good crystallization and being made up of stoichiometric proportion.
Chapter good fortune equality people is by measuring Li (NO
3) and Co (NO
3)
26H
2The O mixing adds an amount of tartaric acid, transfers PH=6-8 with ammoniacal liquor, and 900 ℃ of heating got hard grey black LiCoO in 27 hours
2
These class methods are right the change at high temperature and mix non-uniform phenomenon between solid phase particles and particle, but still the end provides reliable device and mode to control the crystalline condition of reactant in solution system, still can not make uniform particle diameter, the positive electrode of perfect crystalline.
The purpose of this utility model is to improve the deficiencies in the prior art, propose a kind ofly to prepare the homogeneity isomorphous, have the internal crystallization defective, homogeneous grain diameter, than the device of the positive electrode great, that purity is high, specific discharge capacity is big.
The lithium by atomizing hydrolysis lithium deposition or doping and the carbonate of cobalt or nickel or manganese and or the hydroxide composite crystal, under oxygen atmosphere, under stable multistage temperature, carry out the gradient thermal decomposition and become LiCoO then
2Or LiNiO
2Or LiMn
2O
4Or the LiCoO that mixes
2Or LiNiO
2Or LiMn
2O
4Can make positive electrode with These characteristics.
Prepare the used equipment of above-mentioned anode material for lithium-ion batteries, it includes charging spout, reactor, centrifuge and thermal decomposer, and described charging spout connects charge pipe, and described charge pipe feeds in the described reactor, is provided with force (forcing) pump on described charge pipe; Described reactor is a jacketed vessel, the termination of each charge pipe in being located at reactor is provided with shower nozzle, shower nozzle on the described charge pipe one of them (promptly spraying the shower nozzle of alkali lye) places the bottom of reactor, shower nozzle on it upwards, shower nozzle on other charge pipe is located at the top of reactor, shower nozzle on it is downward, the material outlet of described reactor is located on the wall of charge pipe shower nozzle top, described top, establish blender in the described reactor, establish pipeline on the described material outlet and lead in the described centrifuge; Described centrifuge is established discharging opening, connects drive access and is connected with described thermal decomposer.
Described shower nozzle is circular cone shower nozzle or multitube shower nozzle or porous coil pipe.Described blender is made up of blender bar and solid paddle thereon, and the upper and lower of described blender sets firmly two kinds of paddles, and the paddle on described top is oar formula or propeller type, and the paddle of bottom is frame or anchor formula.The preferred top of described blender bar sets firmly the propeller type paddle, and the bottom sets firmly anchor formula paddle.Described thermal decomposer is that horizontal multistage timing temperature control pushes away the boat stove continuously.
In the reaction equipment therefor, lithium salts, alkali lye nickel salt or cobalt salt or manganese salt charge door place respectively in the reactor, its best configuration be the reinforced shower nozzle of alkali lye in reactor below, other reinforced shower nozzle is above reactor.When spray reactant liquor in reactor, alkali lye sprays from bottom to top, and other reactant liquor sprays from top to bottom, and the crystal that crystallizes out is discharged by the outlet on the still wall that is higher than the top spray material port of reactor; Stirring in reaction, the liquid on the top of reactor are the axial flow form, and lower liquid is the Radial Flow form.
When producing positive electrodes such as high-performance lithium cobalt oxygen, lithium nickel oxygen, lithium manganese oxygen, raw material lithium salts, cobalt salt or nickel salt or manganese salt and alkali lye are respectively charged into charging spout, send into after the pressurization in the reactor with chuck heating respectively and react, product is separated and washing through centrifuge, product is put into the horizontal boat stove thermal decomposition that pushes away afterwards, obtains product lithium cobalt oxygen or lithium nickel oxygen or lithium manganese oxygen at last.
The atomizing feed arrangement that the utility model provides, adopt the atomizing hydrolysis method, make reaction raw materials add in the reactor equably by spraying, upwards spraying the alkali lye mist down and add the alkali shower nozzle, other raw material is sprayed downwards, more make in the crystallization process various raw materials uniform, and the design of the blender of dissimilar up and down paddles makes the solution in the reactor mix more even, simultaneously again by the conditioned reaction parameter, as pH value, reaction temperature, reaction time etc. just can guarantee the particle size distribution homogeneous of crystalline solid, than great.The 3rd, the composite junction crystal is when gradient temperature decomposes under the high temperature in described pyrolysis device, because the carbonate resolution characteristic different with hydroxide, make catabolite have lattice defect and huge inside pore volume, thereby have bigger specific area and the capacitance of Geng Gao.
The utility model is described in further detail below by embodiment and accompanying drawing.
The drawing of the utility model accompanying drawing is described as follows:
Fig. 1 is the utility model reaction unit schematic diagram;
Embodiment:
As shown in Figure 1, produce the used device of anode material for lithium-ion batteries, constitute by charging spout 1, reactor 3, centrifuge 9 and the horizontal boat stove 10 that pushes away, raw material lithium salts, cobalt salt or nickel salt or manganese salt and alkali lye are respectively charged into charging spout 1, and the optional 1.5 cubic metres of grooves of charging spout are sent in the reactor 3 after force (forcing) pump 2 pressurizations and reacted, reactor 3 optional 2.5 cubic metres, reactor 3 peripheral hardware chucks 4, water or steam control reaction temperature, and be provided with pH value check mouth.The reinforced shower nozzle 5 of alkali lye places the below in the reactor 3, and the reinforced shower nozzle 6 of lithium sulfate and alloy solution and cobalt sulfate solution is located at the top in the still.Charge door circular cone shower nozzle, material sprays through pressure, also can select for use other form shower nozzle or antipriming pipe or porous disc pipe to make aperture and replace circular cone shower nozzle ejection material.Discharging opening 7 is set above the feed(raw material)inlet, and product is overflowed thus, for the time of staying of control reactant, also can establish a plurality of discharging openings 7.Material is through mixing, and reaction can be more even.Reactor 3 centers are equipped with blender, and upper unit propeller 8 ' impels material axially to stir up and down, and the bottom makes the material radial motion for the anchor formula stirs 8.The crystal that crystallizes out is discharged reactor 3 by top discharge mouth 7, product separates and washs, dries through centrifugal separator 9, lithium cobalt oxygen that obtains wetting or lithium nickel oxygen or lithium manganese oxygen, afterwards, product enters horizontal multistage timing temperature control and pushes away 10 thermal decompositions of boat stove continuously, is packaged to be product.Blender 6 in this covering device, centrifuge 9, force (forcing) pump 2 and horizontal multistage regularly temperature control push away boat stove 10 etc. continuously and all have ready-made technology to use for reference, and do not do detailed description.
Place charging spout to make it have certain speed respectively lithium sulfate solution, cobalt sulfate solution and the alkali lye that is mixed with alloy and be sprayed to reactor by force (forcing) pump, wherein the shower nozzle of alkali lye sprays from bottom to top in the bottom, the shower nozzle of other material is on top, spray from top to bottom, blender rotates in the course of reaction.The crystal that crystallizes out is through overflowing at last discharging opening, advance centrifuge and separate the laggard boat stove that pushes away, move 400 ℃ of thermal decompositions in first section control room 24 hours on the conveyer belt therein continuously, 800 ℃ of thermal decompositions in second section control room are 15 hours then, and the molten amount of oxygen is 2M
3/ hour.
Claims (5)
1, a kind of used equipment of anode material for lithium-ion batteries for preparing, it is characterized in that: include charging spout (1), reactor (3), centrifuge (9) and thermal decomposer (10), described charging spout (1) connects charge pipe, described charge pipe feeds in the described reactor (3), be provided with force (forcing) pump (2) on described charge pipe: described reactor (3) is a jacketed vessel, the termination of each charge pipe in being located at reactor (3) is provided with shower nozzle (5), one of them places the bottom of reactor shower nozzle on the described charge pipe, shower nozzle on it upwards, shower nozzle on other charge pipe is located at the top of reactor, shower nozzle on it is downward, the material outlet of described reactor is located on the wall of top of described top charge pipe shower nozzle, establishes pipeline on the described material outlet (7) and leads in the described centrifuge (9); Establish blender in the described reactor, described centrifuge is established discharging opening, connects drive access and is connected with described thermal decomposer (10).
2, equipment according to claim 1 is characterized in that: described shower nozzle (5) is circular cone shower nozzle or multitube shower nozzle or porous coil pipe.
3, equipment according to claim 1, it is characterized in that: described blender is made up of blender bar and solid paddle thereon, the upper and lower of described blender sets firmly two kinds of paddles, the paddle (8 ') on described top is oar formula or propeller type, and the paddle of bottom (8) is frame or anchor formula.
4, equipment according to claim 3 is characterized in that: described blender bar top sets firmly propeller type paddle (8 '), and the bottom sets firmly anchor formula paddle (8).
5, equipment according to claim 1 is characterized in that: described thermal decomposer is that horizontal multistage timing temperature control pushes away boat stove (10) continuously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00234459U CN2423660Y (en) | 2000-05-08 | 2000-05-08 | Manufacturing equipment for positive material of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00234459U CN2423660Y (en) | 2000-05-08 | 2000-05-08 | Manufacturing equipment for positive material of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2423660Y true CN2423660Y (en) | 2001-03-14 |
Family
ID=33596556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00234459U Expired - Lifetime CN2423660Y (en) | 2000-05-08 | 2000-05-08 | Manufacturing equipment for positive material of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2423660Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098269A (en) * | 2010-08-26 | 2013-05-08 | 宇部兴产株式会社 | Continuous manufacturing method for electrode material |
| CN108479441A (en) * | 2018-05-23 | 2018-09-04 | 江苏泰通新材料有限公司 | A kind of diesel emulsifying machine automatically supplied |
-
2000
- 2000-05-08 CN CN00234459U patent/CN2423660Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103098269A (en) * | 2010-08-26 | 2013-05-08 | 宇部兴产株式会社 | Continuous manufacturing method for electrode material |
| CN108479441A (en) * | 2018-05-23 | 2018-09-04 | 江苏泰通新材料有限公司 | A kind of diesel emulsifying machine automatically supplied |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JINGMEN CITY GELINMEIXIN MATERIAL CO., LTD. Free format text: FORMER OWNER: XU KAIHUA Effective date: 20070713 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070713 Address after: Gelinmei Industrial Park in Hubei province 434000 Jingmen high tech Industrial Development Zone Patentee after: Jingmen GEM New Material Co., Ltd. Address before: 518104, Shenzhen, Guangdong province Baoan District manhole town and an industrial zone 1 Patentee before: Xu Kaihua |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010314 |