Granted Patent
Utility
US 5,229,464 · App. 07/692,839
Epoxidized viscous conjugated diene block copolymers
Inventors:
James R. Erickson, David J. St. Clair
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Apr 29, 1991
Inventors
James R. Erickson
David J. St. Clair
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.