Patents by Inventor Andreas Altherr

Andreas Altherr 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).

  • Consolidated proppants having high mechanical strength and process for the preparation thereof
    Patent number: 8003580
    Abstract: A process for the preparation of hydrolytically and hydrothermally stable consolidated proppants is described, in which (A) a consolidating agent comprising (A1) a hydrolysate or precondensate of at least one functionalized organosilane, a further hydrolyzable silane and at least one metal compound, the molar ratio of silicon compounds used to metal compounds used being in the range of 10 000:1 to 10:1, and (A2) an organic crosslinking agent are mixed with a proppant and (B) the consolidating agent is cured at elevated pressure and elevated temperature. The consolidated proppants obtained have high mechanical strength.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: August 23, 2011
    Assignee: Kraiburg Geotech GmbH
    Inventors: Andreas Altherr, Klaus Endres, Bernd Reinhard, Helmut Schmidt
  • CONSOLIDATED PROPPANTS HAVING HIGH MECHANICAL STRENGTH AND PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20090264323
    Abstract: A process for the preparation of hydrolytically and hydrothermally stable consolidated proppants is described, in which (A) a consolidating agent comprising (A1) a hydrolysate or precondensate of at least one functionalized organosilane, a further hydrolyzable silane and at least one metal compound, the molar ratio of silicon compounds used to metal compounds used being in the range of 10 000:1 to 10:1, and (A2) an organic crosslinking agent are mixed with a proppant and (B) the consolidating agent is cured at elevated pressure and elevated temperature. The consolidated proppants obtained have high mechanical strength.
    Type: Application
    Filed: April 23, 2007
    Publication date: October 22, 2009
    Inventors: Andreas Altherr, Klaus Endres, Bernd Reinhard, Helmut Schmidt
  • Composite mask for producing a diffuser
    Patent number: 7473521
    Abstract: The invention relates to an alternative composite mask that is substantially composed of a transparent support film coated with a transparent polymer matrix that contains light-absorbing pigment particles or metal particles having an average particle size d50 ranging between 0.5 and 10 ?m.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: January 6, 2009
    Assignee: Tomoegawa Co., Ltd.
    Inventors: Takamasa Harada, Fumio Kita, Andreas Zimmermann, Andreas Altherr, Martin Mennig, Peter W. Oliveira, Helmut Schmidt
  • Composite mask for producing a diffuser
    Publication number: 20050008846
    Abstract: The invention relates to an alternative composite mask that is substantially composed of a transparent support film coated with a transparent polymer matrix that contains light-absorbing pigment particles or metal particles having an average particle size d50 ranging between 0.5 and 10 ?m.
    Type: Application
    Filed: December 6, 2002
    Publication date: January 13, 2005
    Inventors: Takamasa Harada, Fumio Kita, Andreas Zimmermann, Andreas Altherr, Martin Mennig, Peter Oliveira, Helmut Schmidt