Granted Patent
Utility
US 4,722,149 · App. 06/834,493
Anti-shuttle pump
Inventors:
Firm L. Weaver, Alan Gertz, Arasu Rajaratnam
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Feb 25, 1986
Inventors
Firm L. Weaver
Alan Gertz
Arasu Rajaratnam
Assignee (at issue)
IMO Delaval Incorporated
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.