Patents by Inventor Eizo Hirai

Eizo Hirai 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).

  • Protection of lyophilized betalactams from color formation
    Patent number: 4418058
    Abstract: A stable preparation of a lyophilized .beta.-lactam antibacterial containing a 7.beta.-(.alpha.-carboxy-.alpha.-arylacetamido)-7.alpha.-methoxy-3-heteroc yclic thiomethyl-1-dethia-1-oxa-3-cephem-4-carboxylic acid (I) alkali metal salt as the antibacterial component and a sugar or sugar alcohol compound as the stabilizing agent.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: November 29, 1983
    Assignee: Shionogi & Co., Ltd.
    Inventors: Eizo Hirai, Kazuhiro Shima