Patents by Inventor Marinus Haddeman

Marinus Haddeman 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).

  • Precipitated silicas as a reinforcing filler for elastomer mixtures
    Patent number: 8658816
    Abstract: The present invention relates to precipitated silicic acids, which have a particularly narrow particle size distribution in combination with a special pore size distribution, to a method for the production thereof, and to the use thereof as a filler for rubber mixtures.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: February 25, 2014
    Assignee: Evonik Degussa GmbH
    Inventors: Andre Wehmeier, Oleg Stenzel, Weicheng Wu, Christian Goetz, Werner Niedermeier, Marinus Haddeman, Anke Blume
  • PRECIPITATED SILICAS AS A REINFORCING FILLER FOR ELASTOMER MIXTURES
    Publication number: 20110021801
    Abstract: The present invention relates to precipitated silicic acids, which have a particularly narrow particle size distribution in combination with a special pore size distribution, to a method for the production thereof, and to the use thereof as a filler for rubber mixtures.
    Type: Application
    Filed: March 19, 2009
    Publication date: January 27, 2011
    Applicant: EVONIK DEGUSSA GmbH
    Inventors: Andre Wehmeier, Oleg Stenzel, Weicheng Wu, Christian Goetz, Werner Niedermeier, Marinus Haddeman, Anke Blume
  • Vulcanizable EPDM containing rubber composition
    Patent number: 6521713
    Abstract: A rubber composition is disclosed containing an ethylene-propylene-nonconjugated diene copolymer rubber (or a blend of an ethylene-propylene-nonconjugated diene copolymer rubber and a diene rubber), a specific alkoxysilane compound, and amorphous silica powder having a specific surface area of 50 to 100 m2/g (BET adsorption). The vulcanized rubber is prepared by vulcanizing such a rubber composition. The rubber composition is excellent in dynamic characteristics and also in mechanical characteristics, dynamic fatigue resistance and thermal aging resistance. It also can provide a vulcanized rubber having the above-mentioned effects.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: February 18, 2003
    Assignees: Degussa AG, Mitsui Petrochemical Industries, Ltd.
    Inventors: Siegfried Wolff, Rainer Panenka, Marinus Haddeman, Hidenari Nakahama
  • VULCANIZABLE EPDM CONTAINING RUBBER COMPOSITION
    Publication number: 20020061979
    Abstract: A rubber composition is disclosed containing an ethylene-propylene-nonconjugated diene copolymer rubber (or a blend of an ethylene-propylene-nonconjugated diene copolymer rubber and a diene rubber), a specific alkoxysilane compound, and amorphous silica powder having a specific surface area of 50 to 100 m2/g (BET adsorption). The vulcanized rubber is prepared by vulcanizing such a rubber composition. The rubber composition is excellent in dynamic characteristics and also in mechanical characteristics, dynamic fatigue resistance and thermal aging resistance. It also can provide a vulcanized rubber having the above-mentioned effects.
    Type: Application
    Filed: April 7, 1995
    Publication date: May 23, 2002
    Inventors: SIEGFRIED WOLFF, RAINER PANENKA, MARINUS HADDEMAN, HIDENARI NAKAHAMA