Granted Patent
Utility
US 4,470,153 · App. 06/366,548
Multiwall pouch bag with vent strip
Inventor:
Ralph H. Kenan
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Mar 8, 1982
Inventor
Ralph H. Kenan
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.