Granted Patent
Utility
US 6,635,718 · App. 10/205,500
Process for the preparation of a hydrogenated polymer composed of diene monomer units and monomer units containing a nitrile group
Inventors:
Johannes Wilhelmus Belt, Marcus Matheus Driessen
Patented Case
View Patent ↗
Granted: Oct 21, 2003
Filed: Jul 26, 2002
Inventors
Johannes Wilhelmus Belt
Marcus Matheus Driessen
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.