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 US06/248,947external-prioritypatent/US4415230A/en
Priority claimed from US06/249,022external-prioritypatent/US4360371A/en
Priority claimed from US06/253,224external-prioritypatent/US4395270A/en
Application filed by Corning Glass WorksfiledCriticalCorning Glass Works
Priority claimed from EP84201088Aexternal-prioritypatent/EP0145031B1/de
Application grantedgrantedCritical
Publication of ATE33975T1publicationCriticalpatent/ATE33975T1/de