Granted Patent
Utility
US 6,316,095 · App. 09/420,040
2-oxetanone sizing agents and their use in paper
Inventors:
Donald K. Black, Kyle J. Bottorff, Clement L. Brungardt, David H. Dumas, Susan M. Ehrhardt, John C. Gast, Jian Zhang
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Oct 18, 1999
Inventors
Donald K. Black
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.