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 US00180276Aexternal-prioritypatent/US3786135A/en
Application filed by Aluminum Co Of AmericafiledCriticalAluminum Co Of America
Publication of ATA811475ApublicationCriticalpatent/ATA811475A/de
Application grantedgrantedCritical
Publication of AT350504BpublicationCriticalpatent/AT350504B/de