Patents by Inventor Manfred Krieg

Manfred Krieg 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).

  • Acrylate resins as binders for color concentrates
    Patent number: 4773913
    Abstract: Color concentrates comprising a colorant such as a pigment and a polymeric binder, and polymeric binders therefor, said polymeric binders comprising:(a) 70-90 percent of methyl methacrylate, by weight of the polymer;(b) 10-20 percent of methyl acrylate; and(c) from 0 to 10 percent of at least one free radically polymerizable monomer of the formula ##STR1## wherein R.sub.1 is hydrogen or methyl and R.sub.2 is a moiety carrying a functional group.
    Type: Grant
    Filed: January 2, 1987
    Date of Patent: September 27, 1988
    Assignee: Rohm GmbH
    Inventors: Manfred Krieg, Hans Lichtenstein, Ludwig Hosch, Guenther Ittmann
  • Acrylonitrile copolymers having low residual monomer content and methods for their preparation
    Patent number: 4241203
    Abstract: What is disclosed are copolymers predominantly containing acrylonitrile and having a very low residual monomer content, for example of less than 100 ppm, the method of making such copolymers by polymerization to at least 60 percent conversion followed by post-heating at a temperature of more than 130.degree. C., and the use of such copolymers in orthopedic devices which come into direct contact with the skin.
    Type: Grant
    Filed: January 24, 1979
    Date of Patent: December 23, 1980
    Assignee: Rohm GmbH
    Inventors: Franz Wenzel, Heinz-Dieter Bruemmer, Manfred Krieg
  • Color stabilized acrylonitrile polymers
    Patent number: 4054162
    Abstract: Compositions containing a polymer or copolymer of acrylonitrile stabilized against thermal discoloration by the presence, in the composition, of a nitroalkane, a nitrocycloalkane, an alkyl-, cycloalkyl-, or aryl-isocyanate, or of a pyrocarbonic acid dialkyl ester are disclosed together with methods for making such compositions.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: October 18, 1977
    Assignee: Rohm GmbH
    Inventors: Manfred Krieg, Armin Meyer