Patents by Inventor Hyman Yarrow

Hyman Yarrow 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).

  • Steroid compositions
    Patent number: 4289764
    Abstract: The invention provides a pharmaceutical composition for topical application comprising an essentially saturated solution of hydrocortisone in aqueous propylene glycol solution containing at least 15% but less than 50% by weight of propylene glycol, the proportion of hydrocortisone in the total composition being at least 0.08% but not greater than 0.4% by weight of aqueous propylene glycol and from 0.025 to 0.4% based on the total weight of the composition, the said composition being characterized by a pH in the range of 2.7 to 3.3, and the substantial absence of metallic cations. Such compositions have excellent storage stability and surprisingly high effectiveness of the hydrocortisone contained therein.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: September 15, 1981
    Assignee: Drythanol Ltd.
    Inventors: Hyman Yarrow, Martin Whitefield
  • Dithranol compositions for topical applications
    Patent number: 4203969
    Abstract: Composition for topical application in the treatment of psoriasis comprises specified amounts of dithranol, an acid and anti-oxidant, petroleum jelly, which may be mixed with a spreadable synthetic rubber, water, and an emulsifier. These compositions show little tendency to spread after application to a psoriatic area and show a reduced tendency to stain.
    Type: Grant
    Filed: April 28, 1978
    Date of Patent: May 20, 1980
    Assignee: Drythanol Limited
    Inventors: Hyman Yarrow, Martin Whitefield