Granted Patent
Utility
US 4,847,340 · App. 07/156,047
Novel propylene polymerization process
Inventors:
George C. Allen, Brian J. Pellon, Michael P. Hughes
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Feb 16, 1988
Inventors
George C. Allen
Brian J. Pellon
Michael P. Hughes
Assignee (at issue)
Rexene Products 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.