Granted Patent
Utility
US 4,392,897 · App. 06/365,814
Manufacturing process for channel seal
Inventor:
Fox J. Herrington
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Apr 5, 1982
Inventor
Fox J. Herrington
Assignee (at issue)
Mobil Oil 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.