Granted Patent
Utility
US 4,270,941 · App. 06/059,834
Apparatus for processing heat softened mineral material
Inventor:
William M. Babbitt
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Jul 23, 1979
Inventor
William M. Babbitt
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.