Granted Patent
Utility
US 4,654,221 · App. 06/814,061
Anti-sticking compositions
Inventors:
Edward R. Purves, Robert F. Thomas
Patented Case
View Patent ↗
Granted: Mar 31, 1987
Filed: Dec 18, 1985
Inventors
Edward R. Purves
Robert F. Thomas
Assignee (at issue)
The Procter & Gamble Company
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.