Patents by Inventor Richard G. Markham

Richard G. Markham 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).

  • Compositions and methods for administering therapeutically active compounds
    Patent number: 5070085
    Abstract: A composition useful for administering therapeutically active compounds to improve the body absorption and/or retention thereof comprising a composition includes a therapeutically active compound having a molecular weight below about 5,000, having an acidic functional group and a pKa of .ltoreq.6 at pH 7.4 normally eliminated unmetabolized from the body via the renal tubular secretion pathway for organic anions, for example, Vitamin C, and at least one compound selected from the class consisting of L-threonic, L-xylonic and L-lyxonic acids, and the edible salts, aldono-lactones and aldono-lactides thereof.A method for establishing and maintaining body levels of a therapeutically active compound includes the step of administering a therapeutically effective dose of this composition.
    Type: Grant
    Filed: April 6, 1990
    Date of Patent: December 3, 1991
    Assignee: Oxycal Laboratories, Inc.
    Inventor: Richard G. Markham
  • Compositions and methods for administering therapeutically active compounds
    Patent number: 4968716
    Abstract: A composition useful for administering therapeutically active compounds to improve the body absorption and/or retention thereof comprising a composition which includes a therapeutically active compound having a molecular weight below about 5,000 and having an acidic functional group, which is normally eliminated from the body via the renal tubular secretion pathway for organic anions, for example, Vitamin C, and at least one compound selected from the class consisting of L-threonic, L-xylonic and L-lyxonic acids, and the edible salts, aldono-lactones and aldono-lactides thereof.A method for establishing and maintaining body levels of a therapeutically active compound which includes the step of administering a therapeutically effective dose of this composition.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: November 6, 1990
    Assignee: Oxycal Laboratories, Inc.
    Inventor: Richard G. Markham
  • Compositions and methods for administering vitamin C
    Patent number: 4822816
    Abstract: A composition useful for administering Vitamin C to a subject comprises a compound having Vitamin C activity and at least one compound selected from the class consisting of the aldono-lactones and edible salts of L-threonic, L-xylonic and L-lyxonic acids.High Vitamin C levels in the human body are established by orally administering to a human subject an effective amount of this composition.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: April 18, 1989
    Assignee: Oxycal Laboratories, Inc.
    Inventor: Richard G. Markham