Patents by Inventor Hans J. Lorenz

Hans J. Lorenz 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).

  • Stabilization systems from triarylphosphites and phenols
    Patent number: 4290941
    Abstract: Stabilization system consisting of a triarylphosphite of the general formula ##STR1## wherein R.sub.1 represents tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl, and one ofR.sub.2 and R.sub.3 is hydrogen and the other is hydrogen, methyl, tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl,and a phenolic antioxidant, for stabilizing polyolefins.
    Type: Grant
    Filed: August 24, 1979
    Date of Patent: September 22, 1981
    Assignee: Ciba-Geigy Corporation
    Inventors: Horst Zinke, Hans J. Lorenz, Helmut Linhart
  • Stabilization systems from triarylphosphites and phenols
    Patent number: 4187212
    Abstract: Stabilization system consisting of a triarylphosphite of the general formula ##STR1## wherein R.sub.1 represents tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl, and one ofR.sub.2 and R.sub.3 is hydrogen and the other is hydrogen, methyl, tert.-butyl, 1,1-dimethylpropyl, cyclohexyl or phenyl,and a phenolic antioxidant, for stabilizing polyolefins.
    Type: Grant
    Filed: June 2, 1977
    Date of Patent: February 5, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Horst Zinke, Hans J. Lorenz, Helmut Linhart