Granted Patent
Utility
US 5,497,909 · App. 08/140,030
Reuseable pouch fitment
Inventors:
Ralph C. Wirsig, John R. Thompson
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: May 12, 1994
Inventors
Ralph C. Wirsig
John R. Thompson
Assignee (at issue)
DuPont Canada Inc.
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.