Granted Patent
Utility
US 5,560,587 · App. 08/261,344
Gate valve sleeve
Inventors:
Andrew J. McCutcheon, Jeffrey M. Bowman, David L. Gambetta
Patented Case
View Patent ↗
Granted: Oct 1, 1996
Filed: Jun 16, 1994
Inventors
Andrew J. McCutcheon
Jeffrey M. Bowman
David L. Gambetta
Assignee (at issue)
Technaflow, 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.