Patents Represented by Attorney Hans-Peter Hoffmann

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  • Multilayered thermoplastic article with special properties
    Patent number: 5827611
    Abstract: Thermoplastic multicomponent articles are shown wherein the components comprise a polymer matrix wherein one component contains at least one uniformly distributed substantially unreactive low molecular weight, guest molecule or compound which imparts different properties to the component.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: October 27, 1998
    Assignee: Hoechst Celanese Corp
    Inventor: Charles E. Forbes
  • Methods for producing amidated or aminated water soluble cellulose acetates
    Patent number: 5502178
    Abstract: A method is disclosed of preparing amidated water soluble cellulose acetates by amidating water soluble cellulose acetate. Methods are also provided for preparing aminated water soluble cellulose acetates of varying plasticities, film- and fiber-forming characteristics, and other properties by methanolysis of naturally-occurring chitin or by amination of water soluble cellulose acetate.
    Type: Grant
    Filed: August 20, 1993
    Date of Patent: March 26, 1996
    Assignee: Hoechst Celanese Corp.
    Inventor: Balarum Gupta