Patents by Inventor Rolf Sperber

Rolf Sperber 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 the synthesis of polymer carbodiimides with added cesium salts, polymer carbodiimides, and use thereof
    Patent number: 10351652
    Abstract: The present invention relates to processes for producing polymeric carbodiimides by addition of cesium salts and to polymeric carbodiimides produced by this process and to the use thereof as a hydrolysis inhibitor, especially in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: July 16, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Wilhelm Laufer, Oliver Herd, Rolf Sperber
  • Bis[3-isopropenyl-?,?-dimethylbenzyl]carbodiimide, production methods, and use of said compound
    Patent number: 10239827
    Abstract: The present invention relates to novel processes for producing bis[3-isopropenyl-?,?-dimethylbenzyl]carbodiimide, to the thus-produced bis[3-isopropenyl-?,?-dimethylbenzyl]carbodiimide and to the use thereof as a hydrolysis inhibitor in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: March 26, 2019
    Assignee: LANXESS Deutschland GmbH
    Inventors: Wilhelm Laufer, Martina Schoenhaber, Armin Eckert, Oliver Herd, Rolf Sperber
  • Method for the Synthesis of Polymer Carbodiimides with Added Cesium Salts, Polymer Carbodiimides, and Use Thereof
    Publication number: 20180171058
    Abstract: The present invention relates to processes for producing polymeric carbodiimides by addition of cesium salts and to polymeric carbodiimides produced by this process and to the use thereof as a hydrolysis inhibitor, especially in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.
    Type: Application
    Filed: June 14, 2016
    Publication date: June 21, 2018
    Applicant: LANXESS Deutschland GmbH
    Inventors: Wilhelm LAUFER, Oliver HERD, Rolf SPERBER
  • BIS[3-ISOPROPENYL-ALPHA,ALPHA-DIMETHYLBENZYL]CARBODIIMIDE, PRODUCTION METHODS, AND USE OF SAID COMPOUND
    Publication number: 20170088509
    Abstract: The present invention relates to novel processes for producing bis[3-isopropenyl-?,?-dimethylbenzyl]carbodiimide, to the thus-produced bis[3-isopropenyl-?,?-dimethylbenzyl]carbodiimide and to the use thereof as a hydrolysis inhibitor in polyurethane (PU)-based systems, preferably thermoplastic TPU, PU adhesives, PU casting resins, PU elastomers or PU foams.
    Type: Application
    Filed: June 3, 2015
    Publication date: March 30, 2017
    Applicant: Rhein Chemie Rheinau GmbH
    Inventors: Wilhelm LAUFER, Martina SCHOENHABER, Armin ECKERT, Oliver HERD, Rolf SPERBER
  • Change-speed gearbox shift device
    Patent number: 5547057
    Abstract: A shift device for a change-speed gearbox has annular shaped coil spring element, which is closed upon itself in the peripheral direction, is mounted on a synchronizer ring and can be deflected centripetally relative to the rotation axis of a shaft mounting a gear. The deflection is caused by inclined surfaces on teeth of an inner axial coupling toothing of a shift sleeve for the purpose of building up shifting and synchronizing forces.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: August 20, 1996
    Assignee: Mercedes-Benz
    Inventor: Rolf Sperber