Granted Patent
Utility
US 5,265,642 · App. 07/910,247
Pressure relief valve in a cap
Inventors:
William Frank Buckminster, Richard J. Viscusi, Larry V. Greenley
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 9, 1992
Inventors
William Frank Buckminster
Richard J. Viscusi
Larry V. Greenley
Assignee (at issue)
SP Industries LLC
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.