Granted Patent
Utility
US 4,290,293 · App. 06/103,440
Method for deep drawing
Inventor:
Ronald J. Selines
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Dec 14, 1979
Inventor
Ronald J. Selines
Assignee (at issue)
Union Carbide 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.