Granted Patent
Utility
US 5,002,997 · App. 07/493,603
Modified block copolymer/oil blends
Inventors:
Richard Gelles, Lorelle A. Pottick, Carl L. Willis
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Mar 15, 1990
Inventors
Richard Gelles
Lorelle A. Pottick
Carl L. Willis
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.