Granted Patent
Utility
US 4,476,243 · App. 06/501,779
Olefin polymerization catalyst and catalyst support
Inventor:
Robert A. Dombro
Patented Case
View Patent ↗
Granted: Oct 9, 1984
Filed: Jun 7, 1983
Inventor
Robert A. Dombro
Assignee (at issue)
Chemplex, Ltd.
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.