Patents by Inventor Werner Ringenberg

Werner Ringenberg 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).

  • Compatible polymer mixtures
    Patent number: 5449557
    Abstract: A compatible, single-phase, polyblend comprisingI) a polymer which is a polycarbonate, polyvinyl chloride, or polyvinylidene fluoride, andII) a copolymer comprising from 40 to 99.99 percent by weight ofA) a monomeric ester formed between acrylic acid or methacrylic acid and a C1-C10 alcohol, and from 0.01 to 60 percent by weight ofB) a monomer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl, Y is oxygen or -NR.sub.2 - where R.sub.2 is hydrogen or alkyl, and Z isi) a 2-hydroxyphenyl benzotriazole,ii) a 2-hydroxybenzophenone or 2-hydroxyacetophenone,iii) an alpha-cyano-beta,beta-diphenyl, andC) optional other monomers.
    Type: Grant
    Filed: September 5, 1990
    Date of Patent: September 12, 1995
    Assignee: Rohm GmbH
    Inventors: Ralf Liebler, Werner Ringenberg