This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the...http://www.google.es/patents/US7879994?utm_source=gb-gplus-sharePatente US7879994 - Cellulose interpolymers and method of oxidation