Granted Patent
Utility
US 6,313,202 · App. 08/069,246
Cellulose ester blends
Inventors:
Charles Michael Buchanan, Robert M. Gardner, Alan W. White, Matthew Davie Wood
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: May 28, 1993
Inventors
Charles Michael Buchanan
Robert M. Gardner
Alan W. White
Matthew Davie Wood
Assignee (at issue)
Eastman Chemical Company
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.