Granted Patent
Utility
US 6,831,143 · App. 10/222,811
Polymerization catalysts
Inventors:
George Johan Peter Britovsek, Birgit Angelika Dorer, Vernon Charles Gibson, Brian Stephen Kimberley, Gregory Adam Solan
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Aug 19, 2002
Inventors
George Johan Peter Britovsek
Birgit Angelika Dorer
Vernon Charles Gibson
Brian Stephen Kimberley
Gregory Adam Solan
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.