Granted Patent
Utility
US 6,051,160 · App. 09/060,725
Pitch control composition based on blend of derivatized cationic guar and styrene maleic anhydride copolymer
Inventors:
Linda M. Hlivka, George K. Wai
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Apr 15, 1998
Inventors
Linda M. Hlivka
George K. Wai
Assignee (at issue)
Ashland, Inc.
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.