Granted Patent
Utility
US 4,157,237 · App. 05/922,990
Molding element for producing thermoplastic film
Inventor:
Garland E. Raley
Patented Case
View Patent ↗
Granted: Jun 5, 1979
Filed: Jul 10, 1978
Inventor
Garland E. Raley
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.