Patents Represented by Attorney, Agent or Law Firm Katten Muchin Davis
  • Biodegradable polymers based on natural and renewable raw materials especially isosorbite
    Patent number: 6342300
    Abstract: The invention relates to biodegradable polycondensates, to the production of said polycondensates, and to their use for releasing specific substances. The polycondensates are derived from at least three components chosen from the following group: a) dianhydrohexites b) bivalent (polyvalent) organic carboxylic acids and c) polyvalent organic carboxylic acids which, in addition to two carboxylic acid functions, have at least one other, optionally capped, i.e., OH and/or COOH function.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: January 29, 2002
    Assignee: Celanese Ventures GmbH
    Inventors: Holger Bengs, Alex Schoenfeld, Gitte Boehm, Siegfried Weis, Joachim Clauss