Granted Patent
Utility
US 4,647,626 · App. 06/807,631
Method and composition for improved melt processability of chlorinated polyvinyl chloride
Inventor:
Marvin H. Lehr
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Dec 11, 1985
Inventor
Marvin H. Lehr
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.