Granted Patent
Utility
US 4,666,489 · App. 06/805,677
Method and apparatus for feeding a rotating melter
Inventor:
Henry M. Demarest, Jr.
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Dec 6, 1985
Inventor
Henry M. Demarest, Jr.
Assignee (at issue)
PPG Industries, Inc.
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.