Patents by Inventor Hans Peter von Lauff

Hans Peter von Lauff 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).

  • Patent number: 4063957
    Abstract: A process for the manufacture of easily dispersed, transparent iron oxide pigments of high tinctorial strength, in which the pigment paste, moist with water, is homogenized under the action of shear forces in the presence of at least one monohydric aliphatic or cycloaliphatic alcohol of 4 to 12 carbon atoms which is partially soluble in water and can be vaporized without decomposition, and the kneaded mixture is then dried under gentle conditions. The pigments are easily dispersed in finishes or binder solutions for printing inks. Very pure and glossy colorations of optimum transparency are obtained.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: December 20, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans Peter von Lauff, Wolfgang Fabian, Heidrun Hellstern