Granted Patent
Utility
US 6,552,132 · App. 09/779,700
Process for the hydrogenation of a polymer composed of diene monomer units and nitrile group containing monomer units and hydrogenated polymer
Inventors:
Johannes Wilhelmus Belt, Jacobus Adriaan Antonius Vermeulen, Nikhil Singha, Olav Marcus Aagaard, Mike Köstermann
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Feb 9, 2001
Inventors
Johannes Wilhelmus Belt
Jacobus Adriaan Antonius Vermeulen
Nikhil Singha
Olav Marcus Aagaard
Mike Köstermann
Assignee (at issue)
DSM N.V.
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.