Granted Patent
Utility
US 4,281,979 · App. 06/088,450
Apparatus to form a flat-topped rim on a thin-walled foam plastic container
Inventors:
Thomas E. Doherty, William F. Herzog
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Oct 26, 1979
Inventors
Thomas E. Doherty
William F. Herzog
Assignee (at issue)
Owens-Illinois 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.