Granted Patent
Utility
US 5,161,807 · App. 07/768,386
Spiral wound gasket
Inventors:
Kurt Allen, Walter Stephan
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Sep 30, 1991
Inventors
Kurt Allen
Walter Stephan
Assignee (at issue)
Flexitallic Limited
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.