Granted Patent
Utility
US 6,213,351 · App. 09/472,696
Push body valve closure
Inventors:
Thomas C. Stoneberg, Gary L. Berge
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Dec 27, 1999
Inventors
Thomas C. Stoneberg
Gary L. Berge
Assignee (at issue)
Courtesy 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.