Patents by Inventor Frank Freidel

Frank Freidel 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 of preparing ethylene polymers by controlled high pressure polymerization
    Patent number: 9732168
    Abstract: The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1, 2-4.5).
    Type: Grant
    Filed: January 10, 2013
    Date of Patent: August 15, 2017
    Assignee: BASF SE
    Inventors: Michael Roth, Rudolf Pfaendner, Gerhard Luft, Frank Freidel
  • METHOD OF PREPARING ETHYLENE POLYMERS BY CONTROLLED HIGH PRESSURE POLYMERIZATION
    Publication number: 20100210800
    Abstract: The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Poyldispersity Index PD=1.2-4.5).
    Type: Application
    Filed: June 24, 2009
    Publication date: August 19, 2010
    Applicant: CIBA CORPORATION
    Inventors: MICHAEL ROTH, RUDOLF PFAENDNER, GERHARD LUFT, FRANK FREIDEL
  • Method of Preparing Ethylene Polymers by Controlled High Pressure Polymerization
    Publication number: 20080234453
    Abstract: The present invention relates to a method for the radical polymerization or copolymerization of ethylene at high pressures using a hydroxylamine ester as radical initiator. The hydroxylamine esters according to the invention are suitable initiators for the high pressure polymerization of ethylene leading to high molecular weight polyethylenes with narrow molecular weight distributions (Polydispersed Index PD=1.2?4.5).
    Type: Application
    Filed: March 14, 2005
    Publication date: September 25, 2008
    Inventors: Michael Roth, Rudolf Pfaendner, Gerhard Luft, Frank Freidel