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
Priority claimed from US06/567,090external-prioritypatent/US4482357A/en
Priority claimed from US06/567,071external-prioritypatent/US4482355A/en
Priority claimed from US06/567,089external-prioritypatent/US4482356A/en
Application filed by Ethyl CorpfiledCriticalEthyl Corp
Priority claimed from EP84309143Aexternal-prioritypatent/EP0147240B1/en
Application grantedgrantedCritical
Publication of ATE41951T1publicationCriticalpatent/ATE41951T1/en