Granted Patent
Utility
US 4,240,839 · App. 06/052,702
Thermal insulation material
Inventors:
Charles E. Crepeau, Robert F. Mulvey
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: Jun 28, 1979
Inventors
Charles E. Crepeau
Robert F. Mulvey
Assignee (at issue)
General Electric Company
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.