Patents by Inventor Dirk Hammel

Dirk Hammel 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).

  • 9-cyano-substituted perylene-3,4-dicarboxylic acid monoimides
    Patent number: 7550606
    Abstract: The current invention relates to a perylene-3,4-dicarboxylic anhydride, substituted in the 9-position, of the general formula III wherein Z is bromine or cyano, and processes for preparing 9-bromoperylene-3,4-dicarboxylic anhydride and 9-cyanoperylene-3,4-dicarboxylic anhydride.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: June 23, 2009
    Assignees: BASF Aktiengesellschaft, Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Arno Boehm, Peter Blaschka, Willi Helfer, Dirk Hammel, Peter Schlichting, Klaus Muellen
  • 9-CYANO-SUBSTITUTED PERYLENE-3,4-DICARBOXYLIC ACID MONOIMIDES
    Publication number: 20090023937
    Abstract: The current invention relates to a perylene-3,4-dicarboxylic anhydride, substituted in the 9-position, of the general formula III wherein Z is bromine or cyano, and processes for preparing 9-bromoperylene-3,4-dicarboxylic anhydride and 9-cyanoperylene-3,4-dicarboxylic anhydride.
    Type: Application
    Filed: September 26, 2008
    Publication date: January 22, 2009
    Applicants: BASF Aktiengesellschaft, Max-Planck-Gesellschaft Zur Foerd Der Wissen. E.V.
    Inventors: Arno Bohm, Peter Blaschka, Willi Helfer, Dirk Hammel, Peter Schlichting, Klaus Mullen
  • 9-Cyano-substituted perylene-3, 4-dicarboxylic monoimides
    Patent number: 7446198
    Abstract: A 9-cyano-substituted perylene-3,4-dicarboxylic monoimide I where the variables are defined in the specification.
    Type: Grant
    Filed: September 8, 2003
    Date of Patent: November 4, 2008
    Assignees: BASF Aktiengesellschaft, Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Arno Boehm, Peter Blaschka, Willi Helfer, Dirk Hammel, Peter Schlichting, Klaus Muellen
  • Method for recycling a disk having a layered structure on a glass substrate
    Patent number: 6585906
    Abstract: A method for recycling a disk having a layered structure on a glass substrate is disclosed. Initially, the disk is exposed to gaseous sulphur dioxide in a humid environment. Then, the disk is treated with hot water to remove the layered structure from the glass substrate.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: July 1, 2003
    Assignee: International Business Machines Corporation
    Inventors: Dirk Hammel, Holger Roehl, Theo Schmitz, Johannes Windeln
  • Method for recycling a disk having a layered structure on a glass substrate
    Publication number: 20020084247
    Abstract: A method for recycling a disk having a layered structure on a glass substrate is disclosed. Initially, the disk is exposed to gaseous sulphur dioxide in a humid environment. Then, the disk is treated with hot water to remove the layered structure from the glass substrate.
    Type: Application
    Filed: November 26, 2001
    Publication date: July 4, 2002
    Applicant: International Business Machines Corporation
    Inventors: Dirk Hammel, Holger Roehl, Theo Schmitz, Johannes Windeln