Granted Patent
Utility
US 4,496,490 · App. 06/120,753
Non-toxic organotin stabilizers for vinyl chloride polymers
Inventor:
William A. Larkin
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Feb 12, 1980
Inventor
William A. Larkin
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.