Patents by Inventor Peter Jenker

Peter Jenker 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).

  • Publication number: 20020066662
    Abstract: A process for the purification of crude N,N′-diphenyl-p-phenylenediamine (DPPD), which comprises extracting crude DPPD with a hydrocarbon or hydrocarbon mixtures thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer, and recovering purified DPPD from the solution.
    Type: Application
    Filed: January 11, 2000
    Publication date: June 6, 2002
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter
  • Patent number: 6398917
    Abstract: An apparatus for the purification of crude N,N′-diphenyl-p-phenylenediamine (DPPD) in which there is an extraction unit containing a liquid permeable container and an adsorption layer downstream of the container, a solvent evaporator downstream of the adsorption layer, a filter unit, a line for returning the filtrate to the solvent evaporator, and a condenser for returning solvent to the extraction unit.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: June 4, 2002
    Assignee: Degussa-Huels Aktiengesellschaft
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter
  • Patent number: 6026880
    Abstract: A process for the purification of crude N,N'-diphenyl-p-phenylenediamine (DPPD), which comprises extracting crude DPPD with a hydrocarbon or hydrocarbon mixtures thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer, and recovering purified DPPD from the solution.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: February 22, 2000
    Assignee: Huels Aktiengesellschaft
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter
  • Patent number: 5945554
    Abstract: A process for the stabilizing of an organosilane with an effective, stabilizing amount of purified N,N'-diphenyl-p-phenylenediamine (DPPD). The purification of crude DPPD involves extracting crude DPPD with hexane thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer comprising silica gel as the adsorbent to form a solution containing purified DPPD and recovering the purified DPPD from the solution.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: August 31, 1999
    Assignee: Huels Aktiengesellschaft
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter
  • Patent number: 5869728
    Abstract: Fluoroalkyl organosilicon compounds are prepared by reacting fluoroolefins with organosilicon compounds that contain at least one H--Si group, in the presence of a Pt(0) complex catalyst. Further, fluoroalkylalkoxy organosilicon compounds are prepared by esterifying fluoroalkyl organosilicon compounds. The process proceeds uniformly under mild conditions with high yields and selectivities.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: February 9, 1999
    Assignee: Huels Aktiengesellschaft
    Inventors: Peter Jenker, Albert-Johannes Frings, Michael Horn, Jaroslaw Monkiewicz, Burkhard Standke
  • Patent number: 5763666
    Abstract: A process for the purification of crude N,N'-diphenyl-p-phenylenediamine (DPPD), which comprises extracting crude DPPD with a hydrocarbon or hydrocarbon mixtures thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer, and recovering purified DPPD from the solution.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: June 9, 1998
    Assignee: Huels Aktiengesellschaft
    Inventors: Albert-Johannes Frings, Michael Horn, Peter Jenker, Jaroslaw Monkiewicz, Hans-Guenther Srebny, Burkhard Standke, Bertram Trautvetter