Granted Patent
Utility
US 4,279,807 · App. 06/103,364
Synergistic heat stabilizer compositions containing an antimony or a bismuth compound
Inventor:
Robert D. Dworkin
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: Dec 13, 1979
Inventor
Robert D. Dworkin
Assignee (at issue)
M&T Chemicals, 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.