Patents by Inventor Brigitte Wissel

Brigitte Wissel 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).

  • Thin cover sheet for use in microscopic staining and a process for its production
    Patent number: 4302480
    Abstract: A thin cover sheet for use in microscopic staining consists essentially of a transparent, water-insoluble plastic carrier and a coating thereon comprising a colorant, and at least one polymer which is soluble both in water and in lower aliphatic alcohols. A method of microscopic staining comprises applying an aqueous solution or a lower aliphatic alcohol solution onto the side of a microscopic plate containing a test sample to be stained or onto the coating of such a thin cover sheet for use in the microscopic staining and contacting the test sample side of the microscopic plate and the coating side of the thin cover sheet.
    Type: Grant
    Filed: June 15, 1979
    Date of Patent: November 24, 1981
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Wolfgang Fischer, Brigitte Wissel
  • Agent and process for carrying out colorimetric or photometric determinations
    Patent number: 4275031
    Abstract: An agent for use in a colorimetric or photometric determination in aqueous solution comrpises:a molded substrate made of non-absorbent, water-insoluble material; anda coating thereon of a solid or waxy organic polymer which dissolves in water to form an optically clear solution;said polymeric coating having a reagent for the determination embedded therein.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: June 23, 1981
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Wolfgang Fischer, Brigitte Wissel