Patents by Inventor John K. C. Yen

John K. C. Yen 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).

  • Process for preparing the combination products of triamterene and hydrochlorothiazide
    Patent number: 4804540
    Abstract: A combination pharmaceutical composition is described, together with the process for manufacturing said pharmaceutical composition wherein the active ingredients, namely triamterene and hydrochlorothiazide, are incorporated into a solid dosage form via a single wet granulation process utilizing an acid component. Said process simplifies the formulation and manufacturing, permits greater uniformity, and increases in vitro dissolution.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: February 14, 1989
    Assignee: G. D. Searle & Co.
    Inventors: Frederic J. Nugent, John K. C. Yen