Granted Patent
Utility
US 6,182,971 · App. 09/208,297
Gas seal for pumps
Inventors:
Joseph C. Parker, Christopher D. McCoway
Patented Case
View Patent ↗
Granted: Feb 6, 2001
Filed: Dec 9, 1998
Inventors
Joseph C. Parker
Christopher D. McCoway
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.