Granted Patent
Utility
US 4,750,334 · App. 07/030,336
Balanced thermostatic expansion valve for refrigeration systems
Inventor:
John G. Leimbach
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Mar 26, 1987
Inventor
John G. Leimbach
Assignee (at issue)
Sporlan Valve Company
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.