Granted Patent
Utility
US 6,221,968 · App. 09/479,179
Process for producing specific tapered block copolymers
Inventors:
Harvey E. Atwood, Michael J. Modic, Barry Moore, John Louis Scheve, Christine Marie Christian
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Jan 7, 2000
Inventors
Harvey E. Atwood
Michael J. Modic
Barry Moore
John Louis Scheve
Christine Marie Christian
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.