Granted Patent
Utility
US 5,242,986 · App. 07/927,904
Selective partial hydrogenation of conjugated diolefin polymers
Inventors:
Carma J. Gibler, Linda R. Chamberlain, Ronald J. Hoxmeier
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Aug 10, 1992
Inventors
Carma J. Gibler
Linda R. Chamberlain
Ronald J. Hoxmeier
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.