Patents by Inventor Holger Buhler

Holger Buhler 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).

  • Method for the production of bisepoxides and dithiols
    Publication number: 20090149666
    Abstract: Process for the preparation of bisepoxides, wherein a conjugated diene of the formula I where R1 is selected from hydrogen and C1-C12-alkyl, unsubstituted or substituted by one or more S—H or O—H groups, is reacted in the presence of a catalyst which is obtainable by bringing at least one manganese compound selected from A2MnX4, AMnX3, MnY, MnX2 and MnX3 into contact with at least one ligand L of the formula II where X are identical or different and are selected from monovalent anions, Y is a divalent anion, A is selected from alkali metal and ammonium, which may be alkylated, R2 are identical or different and are selected from C1-C20-alkyl, and at least one coligand which is derived from monocarboxylic acids, dibasic or polybasic carboxylic acids or diamines, with at least one peroxide, up to 4 equivalents of peroxide being used per equivalent of C—C double bond.
    Type: Application
    Filed: February 12, 2009
    Publication date: June 11, 2009
    Applicant: BASF Aktiengesellschaft
    Inventors: Holger BUHLER, Joaquim Henrique Teles, Gunther Pabst, Tilman Ludecke Taeger
  • Method for the production of bisepoxides and dithiols
    Publication number: 20060277687
    Abstract: Process for the preparation of bisepoxides, wherein a conjugated diene of the formula I where R1 is selected from hydrogen and C1-C12-alkyl, unsubstituted or substituted by one or more S—H or O—H groups, is reacted in the presence of a catalyst which is obtainable by bringing at least one manganese compound selected from A2MnX4, AMnX3, MnY, MnX2 and MnX3 into contact with at least one ligand L of the formula II where X are identical or different and are selected from monovalent anions, Y is a divalent anion, A is selected from alkali metal and ammonium, which may be alkylated, R2 are identical or different and are selected from C1-C20-alkyl, and at least one coligand which is derived from monocarboxylic acids, dibasic or polybasic carboxylic acids or diamines, with at least one peroxide, up to 4 equivalents of peroxide being used per equivalent of C—C double bond.
    Type: Application
    Filed: September 10, 2004
    Publication date: December 14, 2006
    Applicant: BASF Aktiengesellschaft
    Inventors: Holger Buhler, Joaquim Teles, Guenther Pabst, Ludecke Taeger
  • (S)-hydroxynitrile lyases with improved substrate acceptance and their use
    Patent number: 6319697
    Abstract: (S)-Hydroxynitrile lyases which have an improved substrate acceptance and which are derived from the Hevea brasiliensis and Manihot esculenta (S)-hydroxynitrile lyases, wherein one or more bulky amino acid residues within the hydrophobic channel leading to the active center have been replaced with less bulky amino acid residues.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: November 20, 2001
    Assignee: DSM Fine Chemicals Austria GmbH
    Inventors: Franz Effenberger, Harald Wajant, Peter Lauble, Siegfried Förster, Holger Buhler, Helmut Schwab, Christoph Kratky, Ulrike Wagner, Ernst Steiner