Patents by Inventor Kurt M. Bessonen

Kurt M. Bessonen 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).

  • Hydrogen peroxide oxidation of 4-hydroxy-2, 2, 6, 6-tetramethylpiperidine
    Patent number: 5654434
    Abstract: An environmentally friendly process is described for the preparation of 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl by the direct hydrogen peroxide oxidation of 4-hydroxy-2,2,6,6-tetramethylpiperidine in the absence of any catalyst.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: August 5, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Stephen D. Pastor, Andrea R. Smith, Kurt M. Bessonen
  • Carbonate-mediated hydrogen peroxide oxidations of 4-hydroxy-2,2,6,6-tetramethylpiperidine
    Patent number: 5629426
    Abstract: An environmentally friendly process is described for the preparation of 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl by the carbonate-mediated hydrogen peroxide oxidation of 4-hydroxy-2,2,6,6-tetramethylpiperidine.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: May 13, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Stephen D. Pastor, Andrea R. Smith, Kurt M. Bessonen