Granted Patent
Utility
US 4,868,247 · App. 07/148,836
Chlorinated polyvinyl chloride blends having low melt viscosities
Inventors:
Marvin H. Lehr, Paul P. Nicholas
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jan 27, 1988
Inventors
Marvin H. Lehr
Paul P. Nicholas
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.