Granted Patent
Utility
US 4,673,187 · App. 06/753,273
Bimetallic spiral wound gasket
Inventors:
Larry K. Hanson, Gregory M. Pritchett
Patented Case
View Patent ↗
Granted: Jun 16, 1987
Filed: Jul 9, 1985
Inventors
Larry K. Hanson
Gregory M. Pritchett
Assignee (at issue)
Fluorocarbon 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.