Patents by Inventor Douglas J. Harrop

Douglas J. Harrop 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).

  • UV-stabilizer concentrates based on TPU, a process for their production and utilization
    Patent number: 5484827
    Abstract: The invention provides UV-stabilizer concentrates, which, relative to the total weight, consist ofA) 40 to 80 weight-% of at least one thermoplastic polyurethaneB) 10 to 30 weight-% 1,3,5-tri-glycidyl-isocyanurate andC) 10 to 30 weight-% 2-(2-hydroxy-3,5,-di-tert-amyl-phenyl)-2H-benzotriazole and/or 1,6-hexane-di-yl-bis-(3-(3-benzotriazole-N-yl)-4-hydroxy-5-tert-butyl)-phe nyl-propanoate.The invention also discloses a process for their production, and their utilization to stabilize TPU against UV- and thermal-degradation.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: January 16, 1996
    Assignee: BASF Elastogran GmbH
    Inventors: Frank Prissok, Friedhelm Lehrich, Gerhard Lehr, Aleksander Glinka, Douglas J. Harrop