Patents by Inventor Manfred Geisel

Manfred Geisel 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).

  • Compounds useful as pigments containing one or more 2,2,6,6-tetraalkylpiperidine groups
    Patent number: 4866113
    Abstract: A pigment, which retains a crystal or particulate structure throughout a process of coloration of a substrate, containing one or more 2,2,6,6-tetraalkylpiperidine groups.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: September 12, 1989
    Assignee: Sandoz Ltd.
    Inventors: Peter Bitterli, Manfred Geisel, Jurgen Goldmann, Bansi L. Kaul
  • Compounds useful as pigments containing one or more 2,2,6,6-tetraalkylpiperidine groups
    Patent number: 4838943
    Abstract: A pigment, which retains a crystal or particulate structure throughout a process of coloration of a substrate, containing one or more 2,2,6,6-tetraalkylpiperidien groups.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: June 13, 1989
    Assignee: Sandoz Ltd.
    Inventors: Peter Bitterli, Manfred Geisel, Jurgen Goldmann, Bansi L. Kaul