Granted Patent
Utility
US 4,448,932 · App. 06/414,168
Polyvinyl chloride modified with butadiene-containing core-shell composite polymers for enhanced impact strength
Inventors:
Yehuda Ozari, Suzanne B. Nelsen, Andrew Klein
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 2, 1982
Inventors
Yehuda Ozari
Suzanne B. Nelsen
Andrew Klein
Assignee (at issue)
GAF Corporation
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.