Granted Patent
Utility
US 4,258,874 · App. 06/070,243
Two part container having adjustable vents
Inventors:
George P. Webinger, David J. Adamek
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Aug 27, 1979
Inventors
George P. Webinger
David J. Adamek
Assignee (at issue)
Champion International Corporation Limited
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.