Granted Patent
Utility
US 5,187,134 · App. 07/784,951
Formed, polymeric transition-metal complex catalysts with organosiloxane phenylphosphine ligands
Inventors:
Peter Panster, Robert Gradl
Patented Case
View Patent ↗
Granted: Feb 16, 1993
Filed: Nov 1, 1991
Inventors
Peter Panster
Robert Gradl
Assignee (at issue)
Degussa AG
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.