Granted Patent
Utility
US 4,145,001 · App. 05/833,500
Packaging for controlled release of volatile substances
Inventors:
Robert J. Weyenberg, Don W. Seidler
Patented Case
View Patent ↗
Granted: Mar 20, 1979
Filed: Sep 15, 1977
Inventors
Robert J. Weyenberg
Don W. Seidler
Assignee (at issue)
American Can 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.