Granted Patent
Utility
US 6,565,981 · App. 09/280,458
Polymers that are cross-linkable to form superabsorbent polymers
Inventors:
Bernfried Messner, Whei-Neen Hsu, Robert Agne
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Mar 30, 1999
Inventors
Bernfried Messner
Whei-Neen Hsu
Robert Agne
Assignee (at issue)
Stockhausen GmbH & Co. KG
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.