Granted Patent
Utility
US 5,981,739 · App. 08/926,911
Polyanhydride crosslinked fibrous cellulosic products and process for their preparation
Inventors:
Ronald L. Anderson, Wendell Wayne Cattron, Vincent F. Smith, Jr., David J. Fenoglio
Patented Case
View Patent ↗
Granted: Nov 9, 1999
Filed: Sep 10, 1997
Inventors
Ronald L. Anderson
Wendell Wayne Cattron
Vincent F. Smith, Jr.
David J. Fenoglio
Assignee (at issue)
BP Amoco Corp.
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.