Granted Patent
Utility
US 6,509,512 · App. 09/500,205
Multicomponent superabsorbent gel particles
Inventors:
Thomas W. Beihoffer, Michael A. Mitchell
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Feb 8, 2000
Inventors
Thomas W. Beihoffer
Michael A. Mitchell
Assignee (at issue)
BASF SE
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.