Granted Patent
Utility
US 5,723,023 · App. 08/722,785
Method of papermaking using modified cationic starch
Inventors:
John J. Tsai, Walter Maliczyszyn, Teresa Capitani, Christopher L. Kulp
Patented Case
View Patent ↗
Granted: Mar 3, 1998
Filed: Sep 27, 1996
Inventors
John J. Tsai
Walter Maliczyszyn
Teresa Capitani
Christopher L. Kulp
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.