Patents by Inventor Rudiger Herpich

Rudiger Herpich 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).

  • Silica gel-containing rubber compounds with organosilicon compounds as compounding agent
    Patent number: 6593418
    Abstract: The present invention concerns new organic silicon networks, their production process and use in silica-containing rubber compounds and vulcanizates manufactured from them.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: July 15, 2003
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Rüdiger Herpich, Thomas Früh, Ludger Heiliger, Kurt Schilling
  • Silica gel-containing rubber compounds with organosilicon compounds as compounding agent
    Publication number: 20020082333
    Abstract: The invention concerns the use of organic silicon compounds in silica-containing rubber compounds, the process for their production and the process for compounding the silicon compounds with the rubbers and silica-containing fillers and vulcanizates manufactured from them.
    Type: Application
    Filed: September 10, 2001
    Publication date: June 27, 2002
    Inventors: Rudiger Herpich, Thomas Fruh, Ludger Heiliger, Kurt Schilling
  • Silica gel-containing rubber compounds with organosilicon compounds as compounding agent
    Publication number: 20020055588
    Abstract: The present invention concerns new organic silicon networks, their production process and use in silica-containing rubber compounds and vulcanizates manufactured from them.
    Type: Application
    Filed: September 12, 2001
    Publication date: May 9, 2002
    Inventors: Rudiger Herpich, Thomas Fruh, Ludger Heiliger, Kurt Schilling
  • Process for the esterification of unsaturated carboxylic acids with unsaturated alcohols with avoidance of blackening and precipitation
    Patent number: 6350899
    Abstract: The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified phosphoric acids. The process according to the invention in particular avoids discoloration (blackening) of the resultant esterification products.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: February 26, 2002
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Rüdiger Herpich, Bernd Kray, Roland Parg, Erich Schmidt, Stefan Schöpfer, Iris Degen
  • Process for the esterification of unsaturated carboxylic acids with unsaturated alcohols with avoidance of blackening and precipitation
    Publication number: 20010018541
    Abstract: The present invention provides a process for the esterification of unsaturated carboxylic acids with unsaturated alcohols, which is characterized in that esterification is performed in the presence of sterically hindered phenols and partially esterified phosphoric acids. The process according to the invention in particular avoids discoloration (blackening) of the resultant esterification products.
    Type: Application
    Filed: February 21, 2001
    Publication date: August 30, 2001
    Inventors: Rudiger Herpich, Bernd Kray, Roland Parg, Erich Schmidt, Stefan Schopfer, Iris Degen
  • Process for the preparation of aromatic maleimides
    Patent number: 5994561
    Abstract: Aromatic maleimides can be prepared by reacting corresponding aromatic amines with maleic anhydride in the presence of a solvent mixture of halogenated hydrocarbon and a dipolar aprotic solvent, with the addition of acid and a polymerization inhibitor.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: November 30, 1999
    Assignee: Rhein Chemie Rheinau GmbH
    Inventors: Ludger Heiliger, Rudiger Herpich, Josef Kasbauer, Friedrich-Wilhelm Ullrich