Granted Patent
Utility
US 5,085,828 · App. 07/700,744
Cold press die lubrication method
Inventors:
Jon C. Shain, James W. Herchenroeder
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: May 15, 1991
Inventors
Jon C. Shain
James W. Herchenroeder
Assignee (at issue)
General Motors LLC
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.