Granted Patent
Utility
US 4,834,992 · App. 07/013,211
Non-toxic organotin stabilizers for vinyl chloride polymers
Inventor:
William A. Larkin
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Feb 6, 1987
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.