Granted Patent
Utility
US 4,496,162 · App. 06/410,503
Well sealing assembly having resilient seal ring with metal end caps
Inventors:
James P. McEver, James Lewandowski
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Aug 23, 1982
Inventors
James P. McEver
James Lewandowski
Assignee (at issue)
Cameron Iron Works, 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.