Patents by Inventor Matthias Schraml-Marth

Matthias Schraml-Marth 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).

  • Color pigments
    Patent number: 5759257
    Abstract: The present invention relates to color pigments based on substrates which are coated with a doped layer of iron(III) oxide, to processes for their preparation and to their use, especially in aqueous coating systems.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: June 2, 1998
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Klaus Ambrosius, Matthias Schraml-Marth
  • Surface-modified pigments and use thereof as yellowness inhibitors in pigmented plastics
    Patent number: 5565025
    Abstract: The invention relates to surface-modified pigments based on TiO.sub.2 pigments or TiO.sub.2 -coated platelet-shaped substrates and overcoated with a layer consisting of borates of alkaline earth metals and/or double borates of alkali and/or alkaline earth metals and to the use thereof as yellowness inhibitors in plastics and plastics systems.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: October 15, 1996
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventor: Matthias Schraml-Marth
  • Color luster pigments
    Patent number: 5565024
    Abstract: The present invention relates to color luster pigments which, through the incorporation of glass formers, exhibit enhanced luster and also high color strength and transparency.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: October 15, 1996
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventor: Matthias Schraml-Marth
  • Preparation of metal oxide sols by electrolysis
    Patent number: 5378400
    Abstract: The invention relates to the preparation of single-multi-component metal oxide sols by hydrolysis of an aqueous metal salt solution or a solution of a metal salt mixture by direct electrolysis at -20.degree. to 50.degree. C.
    Type: Grant
    Filed: November 30, 1992
    Date of Patent: January 3, 1995
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Manfred Parusel, Klaus Ambrosius, Klaus-Dieter Franz, Wolfgang Hechler, Matthias Schraml-Marth