Granted Patent
Utility
US 5,685,815 · App. 08/192,570
Process of using paper containing alkaline sizing agents with improved conversion capability
Inventors:
Kyle J. Bottorff, Clement L. Brungardt, David H. Dumas, Susan M. Ehrhardt, John C. Gast, Jian Zhang
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Feb 7, 1994
Inventors
Kyle J. Bottorff
Clement L. Brungardt
David H. Dumas
Susan M. Ehrhardt
John C. Gast
Jian Zhang
Assignee (at issue)
HERCULES LLC
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.