Patents by Inventor Urs Ruf

Urs Ruf 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).

  • 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
  • Aqueous concentrates of cold-dyeing fibre reactive dyes
    Patent number: 4264323
    Abstract: Disclosed are stable, concentrated, aqueous dyestuff preparations comprising water, an anionic dispersing agent and at least one cold-dyeing water soluble fibre reactive dye, said dye having an average particle diameter of less that 20 .mu., other optional constituents being one or more disperse dyes, acid, such as acetic acid, to adjust the pH of the preparation to a preferred value of 4 to 6, and organic solvents. The preparations are useful for the convenient production of dyebaths for dyeing substrates containing a fibre reactive dyeable component.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: April 28, 1981
    Assignee: Sandoz Ltd.
    Inventors: Miro Capponi, Urs Ruf, Franz Somm