Granted Patent
Utility
US 4,095,742 · App. 05/718,006
Balanced single port thermostatic expansion valve
Inventor:
Ernest W. Schumacher
Patented Case
View Patent ↗
Granted: Jun 20, 1978
Filed: Aug 26, 1976
Inventor
Ernest W. Schumacher
Assignee (at issue)
Virginia Chemicals 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.