Granted Patent
Utility
US 5,232,015 · App. 07/963,271
Expansion valve with inlet strainer
Inventors:
Joseph H. Heffner, Dennis L. Hoehne
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Oct 19, 1992
Inventors
Joseph H. Heffner
Dennis L. Hoehne
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.