Granted Patent
Utility
US 4,285,681 · App. 06/070,883
Tear resistant separable end-connected bags
Inventors:
Charles R. Walitalo, Alvin E. Ericson
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Aug 29, 1979
Inventors
Charles R. Walitalo
Alvin E. Ericson
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.