Granted Patent
Utility
US 4,317,792 · App. 06/141,326
Process for producing perforated film
Inventors:
Garland E. Raley, James M. Adams
Patented Case
View Patent ↗
Granted: Mar 2, 1982
Filed: Apr 18, 1980
Inventors
Garland E. Raley
James M. Adams
Assignee (at issue)
Ethyl Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.