Granted Patent
Utility
US 4,755,267 · App. 06/870,253
Methods and apparatus for protecting metal structures
Inventor:
David Saunders
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Jun 3, 1986
Inventor
David Saunders
Assignee (at issue)
Pennwalt 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.