Granted Patent
Utility
US 5,338,346 · App. 08/081,438
Soft coating compositions for metals
Inventors:
Lionel B. Luttinger, Rosanna P. Rudy, Paul J. Holtzapfel
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Jun 21, 1993
Inventors
Lionel B. Luttinger
Rosanna P. Rudy
Paul J. Holtzapfel
Assignee (at issue)
Ashland Oil, 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.