Granted Patent
Utility
US 4,308,182 · App. 06/155,682
Dry wire drawing lubricants based on Poly (3,5-dithio-1,2,4-thiadiazole) and Poly (2,5-dithio-1,3,4-thiadiazole)
Inventors:
Alan D. Eckard, James P. King
Patented Case
View Patent ↗
Granted: Dec 29, 1981
Filed: Jun 2, 1980
Inventors
Alan D. Eckard
James P. King
Assignee (at issue)
Pennwalt 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.