Granted Patent
Utility
US 6,442,966 · App. 09/781,008
Fixed orifice expansion device
Inventor:
Herman D. Wiser
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Feb 9, 2001
Inventor
Herman D. Wiser
Assignee (at issue)
Chatleff Controls, 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.