Patents by Inventor Inge Pracht

Inge Pracht 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).

  • Optical immersion oil
    Patent number: 4559147
    Abstract: There are described an immersion oil containing one or more compounds of the formula ##STR1## wherein R is hydrogen or methyl, and its use in optics, especially fluorescence microscopy.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: December 17, 1985
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Georges Hirth, Martin Petrzilka, Inge Pracht
  • Immersion oil containing aliphatic thio compounds
    Patent number: 4493533
    Abstract: Immersion oils containing aliphatic thio compounds are described. The oils have optical properties and are useful in immersion optics such as fluorescence microscopy.
    Type: Grant
    Filed: April 20, 1982
    Date of Patent: January 15, 1985
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Martin Petrzilka, Inge Pracht, Urs Ruf