Granted Patent
Utility
US 5,431,998 · App. 08/061,964
Dimensionally graded conductive foam
Inventors:
Urszula G. Wettermark, Gregory H. Worrell
Patented Case
View Patent ↗
Granted: Jul 11, 1995
Filed: May 14, 1993
Inventors
Urszula G. Wettermark
Gregory H. Worrell
Assignee (at issue)
Lockheed 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.