Granted Patent
Utility
US 6,686,464 · App. 09/704,258
Cellulose ethers and method of preparing the same
Inventors:
Roger Harding, Susan L. H. Crenshaw, Paul E. Gregory, Denise Broughton
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Nov 1, 2000
Inventors
Roger Harding
Susan L. H. Crenshaw
Paul E. Gregory
Denise Broughton
Assignee (at issue)
BKI Holding 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.