Patents by Inventor Urs Schlatter

Urs Schlatter 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).

  • Pigments having improved coloristic properties and process for their preparation
    Patent number: 6913642
    Abstract: Substantially crystalline organic pigments characterized by small particle size and narrow particle size distribution.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: July 5, 2005
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter
  • Pigments having improved coloristic properties and process for their preparation
    Patent number: 6911074
    Abstract: This invention relates to 1,4-diketopyrrolo[3,4c]-pyrrole pigments of the formula characterized by desirable color properties and novel visible absorbance spectra with a steep slope on the bathochromic side of the absorption maximum in the range of from 500 to 650 nm.
    Type: Grant
    Filed: July 8, 2004
    Date of Patent: June 28, 2005
    Assignee: CIBA Specialty Chemicals Corp.
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter
  • Pigments having improved coloristic properties and process for their preparation
    Patent number: 6911075
    Abstract: The invention relates to a process for preparing pigments, which comprises subjecting a crude pigment or mixture of crude pigments and a crystalline inorganic salt or mixture of crystalline inorganic salts together, essentially in the absence of other constituents, to the action of a rotor having a tangential speed of at least 10 m/s, so that a temperature of at least 80° C. is attained by means of friction effects; and subsequently kneading the product of this treatment with an organic liquid, during which it is possible if desired to add additional substances selected from the group consisting of inorganic salts, inert additives and colorant. These pigments and their use in polymers, printing inks and colours filters are also claimed. The invention in particular relates to a novel pigment form of Pigment Violet 23 obtained by above-mentioned process and having higher colour strength and colour saturation as well as excellent other applications properties in particular in printing inks.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: June 28, 2005
    Assignee: CIBA Specialty Chemicals Corp.
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
  • Pigments having improved colouristic properties and process for their preparation
    Publication number: 20040261662
    Abstract: The invention relates to a process for preparing pigments, which comprises
    Type: Application
    Filed: July 8, 2004
    Publication date: December 30, 2004
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
  • Pigments having improved colouristic properties and process for their preparation
    Publication number: 20040250733
    Abstract: The invention relates to a process for preparing pigments, which comprises
    Type: Application
    Filed: July 8, 2004
    Publication date: December 16, 2004
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
  • Pigments having improved colouristic properties and process for their preparation
    Publication number: 20040250732
    Abstract: The invention relates to a process for preparing pigments, which comprises
    Type: Application
    Filed: July 8, 2004
    Publication date: December 16, 2004
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
  • Pigments having improved colouristic properties and process for their preparation
    Publication number: 20030127023
    Abstract: The invention relates to a process for preparing pigments, which comprises
    Type: Application
    Filed: December 4, 2002
    Publication date: July 10, 2003
    Inventors: Yves Grandidier, Albert Riegler, Klaus Ruf, Urs Schlatter, Takashi Deno
  • Pigments having improved colouristic properties and process for their preparation
    Patent number: 6517630
    Abstract: The present invention is directed to a pigment of the formula which, in a gravure ink, has a lightness L* of not more than 48, a chroma C* of at least 53 and a hue angle h of from 295 to 315.
    Type: Grant
    Filed: July 7, 2000
    Date of Patent: February 11, 2003
    Assignee: Ciba Specialty Chemicals Corporation
    Inventors: Yves Grandidier, Urs Schlatter