Patents by Inventor Michael Farrington

Michael Farrington 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).

  • Production of images
    Patent number: 4021059
    Abstract: An image producing system is provided which comprises a carrier material of fabric, paper, a felt or fabric pad impregnated with a color former solution, comprising a weakly volatile high boiling organic solvent having dissolved therein a color former and a color former deactivating substance, wherein the color former is an azo compound and a substrate which has incorporated therein or possesses at least one surface which is at least partially coated with a color former activating substance or system and a re-activating substance which counteracts the de-activating substance.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: May 3, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: James Kenneth Skelly, Michael Farrington