Granted Patent
Utility
US 5,148,684 · App. 07/684,304
Injection valve for a refrigeration system
Inventors:
J. George Leimbach, Joseph H. Heffner
Patented Case
View Patent ↗
Granted: Sep 22, 1992
Filed: Apr 12, 1991
Inventors
J. George Leimbach
Joseph H. Heffner
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.