Granted Patent
Utility
US 4,761,080 · App. 06/518,781
Multilayer gusseted bag with reverse fin seals
Inventor:
Henry G. Schirmer
Patented Case
View Patent ↗
Granted: Aug 2, 1988
Filed: Jul 29, 1983
Inventor
Henry G. Schirmer
Assignee (at issue)
W. R. Grace & Co., Cryovac Div.
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.