Granted Patent
Utility
US 5,668,228 · App. 08/602,014
Polymerization process
Inventors:
Jean-Claude Chinh, Michel C. H. Filippelli, David Newton, Michael Bernard Power
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Feb 15, 1996
Inventors
Jean-Claude Chinh
Michel C. H. Filippelli
David Newton
Michael Bernard Power
Assignee (at issue)
BP Chemicals Limited
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.