Patents by Inventor Albert Egger

Albert Egger 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).

  • Certain naphthofurans and method for their manufacture
    Patent number: 4057562
    Abstract: The invention relates to specific naphthofurans which are useful as cryochromic substances e.g. for measuring the temperature, pH value or radiation field.
    Type: Grant
    Filed: April 2, 1976
    Date of Patent: November 8, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Balli, Albert Egger
  • Furanes, their manufacture and use
    Patent number: 3974180
    Abstract: The invention relates to specific naphthofuranes which are useful as cryochromic substances e.g. for measuring the temperature, pH value or radiation field.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: August 10, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Heinz Balli, Albert Egger