Granted Patent
Utility
US 6,479,593 · App. 09/950,147
Absorbent polymer modification
Inventors:
John H. Clements, Howard P. Klein, Edward T. Marquis, James R. Machac, Jr., Katty Darragas
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Sep 10, 2001
Inventors
John H. Clements
Howard P. Klein
Edward T. Marquis
James R. Machac, Jr.
Katty Darragas
Assignee (at issue)
HUNTSMAN PETROCHEMICAL LLC
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.