Granted Patent
Utility
US 4,281,828 · App. 06/094,422
Plastic bag handling system
Inventors:
James A. McDonald, Earl F. Stachel
Patented Case
View Patent ↗
Granted: Aug 4, 1981
Filed: Nov 15, 1979
Inventors
James A. McDonald
Earl F. Stachel
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.