Granted Patent
Utility
US 5,284,901 · App. 08/049,687
Hydroxyl functional derivatives of epoxidized diene polymers and process for making them
Inventors:
Robert C. Bening, James R. Erickson, Charles J. Stark, David J. St. Clair
Patented Case
View Patent ↗
Granted: Feb 8, 1994
Filed: Apr 16, 1993
Inventors
Robert C. Bening
James R. Erickson
Charles J. Stark
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.