Granted Patent
Utility
US 4,550,441 · App. 06/632,404
Vented bag
Inventor:
Stephen C. Keppel
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Jul 18, 1984
Inventor
Stephen C. Keppel
Assignee (at issue)
St. Regis Paper 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.