Granted Patent
Utility
US 5,789,638 · App. 08/712,660
Hydrogenation of unsaturated polymers using monocyclopentadienyl group IV metal catalysts
Inventors:
Stephen F. Hahn, David R. Wilson
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Sep 13, 1996
Inventors
Stephen F. Hahn
David R. Wilson
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.