Granted Patent
Utility
US 4,680,343 · App. 06/844,639
Chlorinated poly(vinyl chloride) thermoplastic alloys
Inventor:
Biing-Lin Lee
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Mar 27, 1986
Inventor
Biing-Lin Lee
Assignee (at issue)
B. F. Goodrich Company
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.