Granted Patent
Utility
US 5,656,682 · App. 08/156,528
Polymer composition comprising esterified starch and esterified cellulose
Inventors:
Stephen B. Rimsa, Paul D. Tatarka
Patented Case
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Granted: Aug 12, 1997
Filed: Nov 19, 1993
Inventors
Stephen B. Rimsa
Paul D. Tatarka
Assignee (at issue)
National Starch and Chemical Investment Holding Copporation
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.