Patents by Inventor Mark F. Tsao

Mark F. Tsao 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).

  • Patent number: 5252291
    Abstract: A contact lens care device and method for cleaning and disinfecting contact lenses. The invention utilizes both principles of electrophoresis and electrolysis. The device uses a halide-containing electrolytic buffer solution for disinfecting and cleaning. A halogen concentration is generated electrolytically from the halide in the contact lens containing well by the generation of an electrical field between the two electrodes disposed in the well. The field is maintained for a time sufficient to generate a concentration of halogen which can disinfect the lens. The lens is cleaned electrophoretically at the same time. Then, the conversion of the halide to halogen is reversed to remove the halogen from the contact lens containing well. This is done by generating an electrical field between the well electrodes and another electrode located in a reservoir connected to the well by a narrow channel or inert divider.
    Type: Grant
    Filed: July 7, 1992
    Date of Patent: October 12, 1993
    Assignee: Ciba-Geigy Corporation
    Inventor: Mark F. Tsao