Patents by Inventor Keith C. Tovey

Keith C. Tovey 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).

  • Assay of vitamin B12
    Patent number: 4426455
    Abstract: A method of assaying for vitamin B12 achieves denaturation of serum binding proteins which normally bind the vitamin B12 by treatment with alkali at ambient temperature. The assay is characterized by the use, in the alkali denaturation step, of a dithiopolyol and cyanide, and by the use, during the intrinsic factor assay step, of a vitamin B12 analogue such as cobinamide to bind with any remaining serum proteins. The invention also includes a kit, in which the dithiopolyol is provided in admixture with the alkali.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: January 17, 1984
    Assignee: Amersham International Limited
    Inventors: Keith C. Tovey, David T. Carrick