Granted Patent
Utility
US 5,807,947 · App. 08/277,687
Copolymers 4-hydroxystyrene and alkyl substituted-4-hydroxystyrene
Inventors:
Richard Vicari, Douglas J. Gordon, William D. Hinsberg, Dennis McKean, Carlton G. Willson, Ralph R. Dammel
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Jul 20, 1994
Inventors
Richard Vicari
Douglas J. Gordon
William D. Hinsberg
Dennis McKean
Carlton G. Willson
Ralph R. Dammel
Assignee (at issue)
Clariant Finance (BVI) Limited
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.