Patents by Inventor Gunnar Demme

Gunnar Demme 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).

  • Liquid phenolic sulphur-containing antioxidants
    Publication number: 20060116301
    Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.
    Type: Application
    Filed: November 24, 2003
    Publication date: June 1, 2006
    Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Chasan, Gunnar Demme, James Robbins
  • Liquid phenolic sulphur-containing antioxidants
    Patent number: 7026438
    Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant compositions comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: April 11, 2006
    Assignee: Ciba Specialty Chemicals Corp.
    Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Eliezer Chasan, Gunnar Demme, James Robbins
  • Liquid phenolic sulphur-containing antioxidants
    Publication number: 20040267042
    Abstract: The invention relates to liquid sulphur-containing antioxidants and to compositions comprising them. The novel lubricant compositions comprise the reaction product of a selected group of 5-tert-butyl-4-hydroxy-3-methyl(or tert-butyl)phenyl substituted carboxylic acid esters with thiodiethylene glycol and a mono-hydroxy alcohol with a carbon chain length higher than 4 C-atoms. The novel lubricant compositions are highly resistant to oxidative degradation and are capable of reducing the negative effects of deposits, such as black sludge, in motor combustion engines, particularly spark ignition internal combustion engines.
    Type: Application
    Filed: November 26, 2003
    Publication date: December 30, 2004
    Inventors: Hugo Camenzind, Paul Dubs, Roger Martin, David Eliezer Chasan, Gunnar Demme, James Robbins