Patents by Inventor Horst Westenfelder

Horst Westenfelder has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cosmetic composition with polymer-bound benzophenone chromophores
    Patent number: 5869099
    Abstract: A cosmetic composition comprises a polymer with the repeating structural unit (I) ##STR1## where R and R' can be identical or different and are H, alkali metal, ammonium, C.sub.1 -C.sub.30 alkyl,X is a direct linkage, C.sub.1 -C.sub.8 alkylene or C.sub.2 -C.sub.12 oxoalkylene having 1-6 oxygen atoms,Y is a UV-absorbing organic radical,n is 2-800.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: February 9, 1999
    Assignee: BASF Aktiengesellschaft
    Inventors: Harald Keller, Karin Sperling-Vietmeier, Horst Westenfelder
  • Use of selectively hydrogenated styrene/butadiene copolymers in cosmetic and pharmaceutical compositions
    Patent number: 5152991
    Abstract: Copolymers selectively hydrogenated on the olefinic double bond and composed ofA) 50 to 65% by weight styrene,B) 35 to 50% by weight butadiene andC) 0 to 5% by weight other copolymerizable monomers are used in cosmetic and pharmaceutical compositions.
    Type: Grant
    Filed: June 13, 1991
    Date of Patent: October 6, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Friedrich Vogel, Franz Frosch, Horst Westenfelder