Granted Patent
Utility
US 5,964,809 · App. 08/907,147
Polyetheretherketone (PEEK) retaining ring for an acetabular cup assembly
Inventors:
Ruey Y. Lin, Ashok K. Chopra, Allen P. Levine, Bernard Silverstein
Patented Case
View Patent ↗
Granted: Oct 12, 1999
Filed: Aug 6, 1997
Inventors
Ruey Y. Lin
Ashok K. Chopra
Allen P. Levine
Bernard Silverstein
Assignee (at issue)
Howmedica 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.