Granted Patent
Utility
US 6,241,812 · App. 09/245,092
Acid-stable and cationic-compatible cellulose compositions and methods of preparation
Inventors:
Barbara A. Smith, George T. Colegrove, Walter Rakitsky
Patented Case
View Patent ↗
Granted: Jun 5, 2001
Filed: Feb 5, 1999
Inventors
Barbara A. Smith
George T. Colegrove
Walter Rakitsky
Assignee (at issue)
Pharmacia 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.