Granted Patent
Utility
US 4,971,220 · App. 07/449,643
"Container with ""stay open"" lid"
Inventors:
David P. Kaufman, Lynn A. Mellenthin
Patented Case
View Patent ↗
Granted: Nov 20, 1990
Filed: Dec 11, 1989
Inventors
David P. Kaufman
Lynn A. Mellenthin
Assignee (at issue)
Kimberly-Clark 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.