Granted Patent
Utility
US 6,500,947 · App. 09/939,182
Superabsorbent polymer
Inventors:
Hugh West, John A. Westland
Patented Case
View Patent ↗
Granted: Dec 31, 2002
Filed: Aug 24, 2001
Inventors
Hugh West
John A. Westland
Assignee (at issue)
Weyerhaeuser NR 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.