Granted Patent
Utility
US 4,978,700 · App. 07/323,878
Extrudable anti-static polyvinyl chloride resin compositions, and shaped articles formed thereof
Inventor:
David L. Haygood
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Mar 15, 1989
Inventor
David L. Haygood
Assignee (at issue)
Edward S. Robbins, III
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.