Granted Patent
Utility
US 4,837,849 · App. 07/171,053
Stand-up plastic bag and method of making same
Inventors:
Laurence R. Erickson, R. Douglas Behr, Roger D. Vrooman
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Mar 21, 1988
Inventors
Laurence R. Erickson
R. Douglas Behr
Roger D. Vrooman
Assignee (at issue)
THE DOW CHEMICAL 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.