Granted Patent
Utility
US 4,015,776 · App. 05/651,717
Thermostatic expansion valve
Inventors:
Charles D. Orth, Marcel P. Griffoul
Patented Case
View Patent ↗
Granted: Apr 5, 1977
Filed: Jan 23, 1976
Inventors
Charles D. Orth
Marcel P. Griffoul
Assignee (at issue)
The Singer Company Limited
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.