Granted Patent
Utility
US 4,912,965 · App. 07/331,182
Rupture disc monitor
Inventors:
Phillip R. Beaver, Clifford S. Durand, III
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Mar 31, 1989
Inventors
Phillip R. Beaver
Clifford S. Durand, III
Assignee (at issue)
Ethyl 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.