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 US06/830,728external-prioritypatent/US4778750A/en
Priority claimed from US06/832,016external-prioritypatent/US4876193A/en
Application filed by Imreg IncfiledCriticalImreg Inc
Priority claimed from EP87102387Aexternal-prioritypatent/EP0238851B1/de
Application grantedgrantedCritical
Publication of ATE83324T1publicationCriticalpatent/ATE83324T1/de