Granted Patent
Utility
US 4,073,997 · App. 05/724,129
Composite panel
Inventors:
David O. Richards, Isaac P. Jones, Homer W. Duffee, Charles E. Nutter
Patented Case
View Patent ↗
Granted: Feb 14, 1978
Filed: Sep 17, 1976
Inventors
David O. Richards
Isaac P. Jones
Homer W. Duffee
Charles E. Nutter
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.