Granted Patent
Utility
US 6,446,976 · App. 09/655,810
Hydrodynamic face seal with grooved sealing dam for zero-leakage
Inventors:
William E. Key, Lionel A. Young
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Sep 6, 2000
Inventors
William E. Key
Lionel A. Young
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.