Granted Patent
Utility
US 4,301,941 · App. 06/064,164
Container closure
Inventor:
Donald L. Kraft
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Aug 6, 1979
Inventor
Donald L. Kraft
Assignee (at issue)
Phillips Petroleum 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.