Patents by Inventor Detlev Glas

Detlev Glas 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 producing phosphonium salts
    Patent number: 7547807
    Abstract: The present invention relates to a process for preparing quaternary phosphonium salts by reacting a ternary phosphine with an optionally substituted, saturated or monounsaturated or polyunsaturated electrophile having from 3 to 25 carbon atoms in ternary solvent mixtures.
    Type: Grant
    Filed: December 14, 2004
    Date of Patent: June 16, 2009
    Assignee: BASF SE
    Inventors: Laszlo Szarvas, Klemens Massonne, Harald Laas, Kai Michael Exner, Detlev Glas
  • METHOD FOR PRODUCING VITAMIN A ACETATE
    Publication number: 20090043121
    Abstract: The present invention relates to a process for preparing vitamin A acetate by reacting ?-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or aromatic hydrocarbons having 5 to 8 carbon atoms to give ?-ionylideneethyltriphenylphosphonium salts and subsequent Wittig reaction with 4-acetoxy-2-methylbut-2-enal.
    Type: Application
    Filed: October 21, 2008
    Publication date: February 12, 2009
    Applicant: BASF Aktiengesellschaft
    Inventors: Kai Michael Exner, Klemens Massonne, Harald Laas, Detlev Glas, Laszlo Szarvas
  • Method for producing phosphonium salts
    Publication number: 20070123726
    Abstract: The present invention relates to a process for preparing quaternary phosphonium salts by reacting a ternary phosphine with an optionally substituted, saturated or monounsaturated or polyunsaturated electrophile having from 3 to 25 carbon atoms in ternary solvent mixtures.
    Type: Application
    Filed: December 14, 2004
    Publication date: May 31, 2007
    Applicant: Basf Aktiengesellschaft Patents, Trademarks and Licenses
    Inventors: Laszlo Szarvas, Klemens Massonne, Harald Laas, Kai Exner, Detlev Glas
  • Method for producing vitamin a acetate
    Publication number: 20070082950
    Abstract: The present invention relates to a process for preparing vitamin A acetate by reacting ?-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or aromatic hydrocarbons having 5 to 8 carbon atoms to give ?-ionylideneethyltriphenylphosphonium salts and subsequent Wittig reaction with 4-acetoxy-2-methylbut-2-enal.
    Type: Application
    Filed: December 14, 2004
    Publication date: April 12, 2007
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Kai Exner, Klemens Massonne, Harald Laas, Detlev Glas, Laszlo Szarvas