Granted Patent
Utility
US 4,416,132 · App. 06/479,017
Metal forming lubricant and method of use thereof
Inventor:
Donald J. Sargent
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Mar 25, 1983
Inventor
Donald J. Sargent
Assignee (at issue)
E/M Lubricants, Inc.
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.