Granted Patent
Utility
US 5,132,372 · App. 07/756,392
Process for selective hydrogenation of conjugated diolefin polymers
Inventors:
Linda R. Chamberlain, Carma J. Gibler
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: Sep 9, 1991
Inventors
Linda R. Chamberlain
Carma J. Gibler
Assignee (at issue)
SHELL OIL 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.