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 US06/673,470external-prioritypatent/US4593059A/en
Priority claimed from US06/777,131external-prioritypatent/US4681907A/en
Application filed by Morton Int IncfiledCriticalMorton Int Inc
Application grantedgrantedCritical
Publication of ATE74149T1publicationCriticalpatent/ATE74149T1/en