Patents by Inventor Eva Weisser

Eva Weisser 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 preparing an ester and binder system
    Patent number: 9637418
    Abstract: In a method for preparing an ester from an hydroxybenzoic acid and a fatty alcohol for use in a binder system for powder injection molding, transesterification of an ester of the hydroxybenzoic acid and a low alcohol using the fatty alcohol is carried out, the fatty alcohol and the ester of the hydroxybenzoic acid and the low alcohol forming a reaction mixture and being used in an essentially equimolar ratio. The transesterification is carried out at a temperature at which the ester of the hydroxybenzoic acid and the low alcohol and the fatty alcohol are present as a homogeneous melt. The binder system for a powder injection molding contains 80 to 98 wt. % of a metal powder and/or a ceramic powder and 1 to 19 wt. % of a polymeric binder component, and 1 to 19 wt. % of at least one ester prepared by the transesterification.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: May 2, 2017
    Assignee: ROBERT BOSCH GMBH
    Inventors: Wilfried Aichele, Jochen Rager, Klaus Czerwinski, Eberhard Grath, Josef Arnold, Eva Weisser
  • METHOD FOR PREPARING AN ESTER AND BINDER SYSTEM
    Publication number: 20110294935
    Abstract: In a method for preparing an ester from an hydroxybenzoic acid and a fatty alcohol for use in a binder system for powder injection molding, transesterification of an ester of the hydroxybenzoic acid and a low alcohol using the fatty alcohol is carried out, the fatty alcohol and the ester of the hydroxybenzoic acid and the low alcohol forming a reaction mixture and being used in an essentially equimolar ratio. The transesterification is carried out at a temperature at which the ester of the hydroxybenzoic acid and the low alcohol and the fatty alcohol are present as a homogeneous melt. The binder system for a powder injection molding contains 80 to 98 wt. % of a metal powder and/or a ceramic powder and 1 to 19 wt. % of a polymeric binder component, and 1 to 19 wt. % of at least one ester prepared by the transesterification.
    Type: Application
    Filed: November 25, 2009
    Publication date: December 1, 2011
    Inventors: Wilfried Aichele, Jochen Rager, Klaus Czerwinski, Eberhard Grath, Josef Arnold, Eva Weisser