Granted Patent
Utility
US 4,583,746 · App. 06/665,659
Method and apparatus for sealing between two concentric members
Inventor:
John E. Lawson
Patented Case
View Patent ↗
Granted: Apr 22, 1986
Filed: Oct 26, 1984
Inventor
John E. Lawson
Assignee (at issue)
Armco 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.