Granted Patent
Utility
US 6,276,899 · App. 09/435,012
Impeller manufacturing process
Inventors:
Tom Lambert, Ray Piatt
Patented Case
View Patent ↗
Granted: Aug 21, 2001
Filed: Nov 5, 1999
Inventors
Tom Lambert
Ray Piatt
Assignee (at issue)
Flowserve Management 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.