Granted Patent
Utility
US 4,773,848 · App. 07/079,578
Sealed gas control valve
Inventors:
Lynn A. Jalbert, Delbert E. Carver
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Jul 29, 1987
Inventors
Lynn A. Jalbert
Delbert E. Carver
Assignee (at issue)
Advanced Technology Inc.
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.