Granted Patent
Utility
US 4,513,445 · App. 06/453,170
Adhesive closure bags and method for producing same
Inventor:
Ewald A. Kamp
Patented Case
View Patent ↗
Granted: Apr 23, 1985
Filed: Dec 27, 1982
Inventor
Ewald A. Kamp
Assignee (at issue)
Union Carbide Corporation
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.