Patents by Inventor John F. Irwin

John F. Irwin 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).

  • Antihemophilic factor concentrate and its production
    Patent number: 4170639
    Abstract: Antihemophilic factor (AHF) concentrate having enhanced potency and solubility and its process of production are provided. The process includes the steps of removing unwanted protein from an aqueous extract of antihemophilic blood plasma cryoprecipitate by mixing the aqueous extract with aluminum hydroxide at an acid pH in the cold, adjusting the purified aqueous extract to an acid pH and freeze-drying the extract, optionally removing water from the extract just before freeze-drying.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: October 9, 1979
    Assignee: Warner-Lambert Company
    Inventors: Daniel T. H. Liu, John F. Irwin, Rong-Chang Pai