Patents by Inventor Guenter Stein

Guenter Stein 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).

  • Coarse support silica particles
    Patent number: 10752510
    Abstract: The present invention relates to novel granular silicas for use as support material, especially as support for catalysts for fixed bed reactors, and to the production and use thereof.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: August 25, 2020
    Assignee: EVONIK OPERATIONS GMBH
    Inventors: Claus-Peter Drexel, Frank Haselhuhn, Frank Heindl, Ralf Rausch, Guenter Stein
  • Pyrogenic titanium dioxide compressed to slugs
    Patent number: 8349441
    Abstract: Pyrogenic titanium dioxide is compressed to slugs by preliminarily deaerating it, compressing it to slugs, and crushing the slugs and optionally classifying them. The slugs are characterized by a tamped density (to DIN EN ISO 787-11) of 500 to 1200 g/l.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: January 8, 2013
    Assignee: Evonik Degussa GmbH
    Inventors: Ralph Hofmann, Guenter Stein, Frank Menzel
  • COARSE SUPPORT SILICA PARTICLES
    Publication number: 20120322893
    Abstract: The present invention relates to novel granular silicas for use as support material, especially as support for catalysts for fixed bed reactors, and to the production and use thereof.
    Type: Application
    Filed: March 14, 2011
    Publication date: December 20, 2012
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Claus-Peter Drexel, Frank Haselhuhn, Frank Heindl, Ralf Rausch, Guenter Stein
  • Stable aqueous dispersions of precipitated silica
    Patent number: 8092587
    Abstract: The invention relates to stabilized dispersions of precipitated silicon dioxide, to a process for production thereof and to the use thereof, especially for production of paper coatings for glossy photo paper for inkjet printing.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: January 10, 2012
    Assignee: Evonik Degussa GmbH
    Inventors: Florian Zschunke, Burkhard Standke, Stefan Scharfe, Christoph Batz-Sohn, Heinz Lach, Andrea Heuschen, Juergen Behnisch, Markus Ruf, Guenter Stein, Tobias Banert
  • PYROGENIC TITANIUM DIOXIDE COMPRESSED TO SLUGS
    Publication number: 20090280309
    Abstract: Pyrogenic titanium dioxide is compressed to slugs by preliminarily deaerating it, compressing it to slugs, and crushing the slugs and optionally classifying them. The slugs are characterized by a tamped density (to DIN EN ISO 787-11) of 500 to 1200 g/l.
    Type: Application
    Filed: August 9, 2007
    Publication date: November 12, 2009
    Applicant: EVONIK DEGUSSA GMBH
    Inventors: Ralph Hofmann, Guenter Stein, Frank Menzel