Granted Patent
Utility
US 4,909,269 · App. 07/340,146
High pressure regulator valve
Inventors:
Francis E. Pritchard, Vincent J. Kibler
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Apr 14, 1989
Inventors
Francis E. Pritchard
Vincent J. Kibler
Assignee (at issue)
Union Carbide 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.