Granted Patent
Utility
US 4,905,723 · App. 07/339,589
High pressure regulator
Inventors:
Francis E. Pritchard, Vincent J. Kibler
Patented Case
View Patent ↗
Granted: Mar 6, 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.