Granted Patent
Utility
US 6,743,391 · App. 10/301,928
Superabsorbent polymers having delayed water absorption characteristics
Inventors:
Fang Sun, Bernfried Messner, Heather S. Jones
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Nov 21, 2002
Inventors
Fang Sun
Bernfried Messner
Heather S. Jones
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.