Granted Patent
Utility
US 4,332,705 · App. 06/144,711
Asphalt composition modified with a rubbery polymer
Inventor:
William E. Uffner
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Apr 28, 1980
Inventor
William E. Uffner
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.