Granted Patent
Utility
US 5,887,876 · App. 08/840,498
High purity gas fitting with grooved gasket
Inventors:
Lewis L. Aldridge, Kenneth W. Sawyer
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Apr 21, 1997
Inventors
Lewis L. Aldridge
Kenneth W. Sawyer
Assignee (at issue)
Parker-Hannifin Corporation
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.