Patents by Inventor Norbert Wurms

Norbert Wurms 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).

  • Polymeric compounds derived from 2-hydroxy-phenyl-s-triazines substituted with ethylenically unsaturated moieties
    Patent number: 5869588
    Abstract: The invention relates to novel 2-hydroxyphenyltriazines and to homopolymers and copolymers obtainable therefrom, as described in greater detail in claims 1 and 5; the novel compounds can be used as UV absorbers in or for organic materials.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: February 9, 1999
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Vien Van Toan, David George Leppard, Gerhard Rytz, Norbert Wurms, Pascal Hayoz
  • Coating compositions stabilized against damage by light, heat, and oxygen
    Patent number: 5753729
    Abstract: Coatings comprisingA) a binder based on an organic polymer andB) as stabilizer against damage by light, heat and oxygen, a 2-(2'-hydroxyphenyl)-1,3-pyrimidine of the formula I ##STR1## in which the radicals R.sub.1 to R.sup.6 are as defined in claim 1 have an outstanding resistance to the damaging effects of light, oxygen and heat. Compounds of the formula Ib defined in claim 18 are suitable in general for the stabilization of organic material.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: May 19, 1998
    Inventors: Andreas Valet, Jean-Luc Birbaum, Gerhard Rytz, Norbert Wurms
  • 2-Hydroxyphenyl-s-Triazines substituted with ethylenically unsaturated moieties
    Patent number: 5672704
    Abstract: s-Triazine UV absorbers of formula I ##STR1## where R.sub.1 is ##STR2## --CH.sub.2 --C(.dbd.CH.sub.2)--R.sub.10, --(CH.sub.2).sub.p --SiR.sub.11 R.sub.11 '--CH.dbd.CH.sub.2, --C(.dbd.O)--(CH.sub.2).sub.q --CH.dbd.CH.sub.2 or --C(.dbd.O)--O--CH.sub.2 --C(.dbd.CH.sub.2)--R.sub.10 ; and E.sub.1 and E.sub.2 are phenyl groups which may be unsubstituted or substituted with a variety of substituents including inter alia alkyl, OH and R.sub.1 ; are polymerizable and are effective stabilizers for a variety of polymeric and other organic substrates.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: September 30, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Vien Van Toan, David George Leppard, Gerhard Rytz, Norbert Wurms, Pascal Hayoz
  • Photographic recording material containing a UV absorber
    Patent number: 5538840
    Abstract: The invention relates to a photographic recording material comprising, on a base, at least one silver-halide emulsion layer and, if desired, at least one interlayer and/or a protection layer, where at least one of said layers contains a UV absorber of the 2-hydroxyphenyltriazine type, as described in greater detail in claim 1; this UV absorber can also be in the form of a homopolymer or copolymer.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: July 23, 1996
    Assignee: Ciba-Geigy Corporation
    Inventors: Vien Van Toan, David G. Leppard, Gerhard Rytz, Norbert Wurms, Pascal Hayoz