Patents by Inventor Frank Höfer

Frank Höfer 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).

  • Radical interceptors as stabilizers of polymerizable compounds
    Publication number: 20060287548
    Abstract: Process for stabilizing polymerizable compounds to polymerization during working-up, storage and/or transport, in which at least one free radical scavenger which contains at least two glycine units is used, with the proviso that the free radical scavenger is not selected from ethylenediaminetetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), trans-1,2-cyclohexanediaminetetraacetic acid (CYDTA) and the alkali metal and alkaline earth metal salts thereof.
    Type: Application
    Filed: September 18, 2004
    Publication date: December 21, 2006
    Inventors: Frank Hoefer, Sylke Haremza, Gerhard Wagenblast, Volker Schliephake, Ulrich Jaeger
  • Preparation of (METH) acrylic acid and (METH) acrylic esters
    Patent number: 7119224
    Abstract: A process for preparing and/or working up mixtures by (meth)acrylic acid and/or (meth)acrylic ester in the presence of at least one polymerization inhibitor and at least one oxygenous gas, which comprises metering in at least part of the oxygenous gas at an exit rate of at least 50 mm/s.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: October 10, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Juergen Schroeder, Frank Hoefer, Sylke Haremza, Gerhard Wagenblast, Volker Schliephake, Ulrich Jaeger, Harald Keller, Cedric Dieleman
  • Absorption medium having improved oxidation stability, and deacidification of fluid streams
    Publication number: 20050202967
    Abstract: A description is given of an absorption medium for deacidifying fluid streams which has improved oxidation stability and comprises at least one aliphatic amine, in particular an alkanolamine, and at least one non-hydroquinoid antioxidant. The absorption medium serves for deacidifying a fluid stream, in particular an oxygen-containing fluid stream, the fluid stream being brought into intimate contact with the absorption medium in at least one absorption step.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 15, 2005
    Applicant: BASF Aktiengesellschaft
    Inventors: Frank Hoefer, Norbert Asprion, Iven Clausen, Hans Hasse