Patents by Inventor Howard C. Maxfield

Howard C. Maxfield 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).

  • Stabilization of unstable drugs or food supplements
    Patent number: 4597969
    Abstract: A granulation method involving polysaccharide gelling agents, e.g., alginic acid, and a metal salt, e.g., magnesium salt is developed for the stabilization of heat and/or moisture sensitive drugs or food supplements such as Efrotomycin, avermectins, milbemycins, mocimycin and other drugs. It has been found that the granules so obtained can be incorporated into various formulations without substantial decomposition.
    Type: Grant
    Filed: February 1, 1983
    Date of Patent: July 1, 1986
    Assignee: Merck Sharp & Dohme
    Inventors: Howard C. Maxfield, Anthony J. Phillips, Richard J. Yarwood