Granted Patent
Utility
US 5,962,578 · App. 08/974,118
Poly(dialkylaminoalkyl (meth)acrylamide)-based superabsorbent gels
Inventors:
Thomas W. Beihoffer, Michael A. Mitchell, Leticia L. Trzupek
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Nov 19, 1997
Inventors
Thomas W. Beihoffer
Michael A. Mitchell
Leticia L. Trzupek
Assignee (at issue)
AMCOL INTERNATIONAL CORPORATION
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.