Patents by Inventor Kazukiyo Akai

Kazukiyo Akai 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).

  • Capsule shell
    Patent number: 5756123
    Abstract: A capsule shell comprising 79.6-98.7% by weight of a hydroxypropylmethyl cellulose, 0.03-0.5% by weight of carrageenan, and 0.14-3.19% by weight of a potassium ion and/or a calcium is prepared by drying an solution comprising 18-28% by weight of hydroxypropylmethyl cellulose whose 2% aqueous solution has a viscosity of 2.4-5.4 centistokes at 20.degree. C. as a base, 0.01-0.09% by weight of carrageenan as a gelling agent, and 0.05-0.6% by weight of a potassium ion and/or calcium ion as a co-gelling agent. The capsule shell exhibits disintegrating ability equivalent to gelatin shells without degrading that ability even under special conditions containing much calcium ions.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: May 26, 1998
    Assignee: Japan Elanco Co., Ltd.
    Inventors: Taizo Yamamoto, Seinosuke Matsuura, Kazukiyo Akai