Patents by Inventor Tadashi Ukigaya

Tadashi Ukigaya 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 producing a solid which is rapidly soluble in the oral cavity
    Patent number: 6187336
    Abstract: A rapidly soluble solid in the oral cavity comprising erythritol, which has a porous structure; and a process for producing a rapidly soluble solid in the oral cavity comprising erythritol, which comprises the steps of: preparing a composition comprising erythritol and appropriate moisture, kneading the composition, molding the kneaded composition, and drying the molded composition under reduced pressure.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: February 13, 2001
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Mutsuo Okumura, Sachio Motegi, Tadashi Ukigaya, Katsuaki Miyazaki
  • Sustained-release metal valproate tablets
    Patent number: 6106863
    Abstract: The present invention provides a sustained-release metal valproate tablet which is comparatively compact and is not influenced by a meal, the sustained-release metal valproate comprising a core tablet comprising a metal valproate having on the surface a coating layer comprising light silicic acid anhydride dispersed in a mixture of ethyl cellulose and a methacrylic acid-methyl methacrylate copolymer.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: August 22, 2000
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Tadashi Ukigaya, Mutsuo Okumura, Tadashi Tsukune
  • Slow-release sodium valproate tablets
    Patent number: 5589191
    Abstract: A slow, release sodium valproate tablet with a coating layer, obtained by coating a core containing sodium valproate with a coating agent comprising ethyl cellulose having silicic acid anhydride dispersed therein. The slow-release tablets, while having a relatively small size, maintain a stable dissolution rate without being influenced by pH conditions to stably maintain the blood concentration of active agent over an extended period of time.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 31, 1996
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Tadashi Ukigaya, Hirotaka Endoh
  • Sustained release pharmaceutical tablet of theophylline and production process thereof
    Patent number: 4692337
    Abstract: A sustained release pharmaceutical tablet comprising theophylline and ethyl cellulose uniformly dispersed therein in an amount of 5 to 200 parts by weight of ethyl cellulose based on 100 parts by weight of the theophylline, the hardness of the tablet being 0.5 to 16.0 kg. This sustained release pharmaceutical tablet can be prepared by uniformly mixing 100 parts by weight of theophylline and 5 to 200 parts by weight of ethyl cellulose, and compression molding the resultant mixture by a direct compression method to form a tablet.
    Type: Grant
    Filed: September 28, 1984
    Date of Patent: September 8, 1987
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Tadashi Ukigaya, Keizaburo Ogawa
  • Theophylline sustained release granule
    Patent number: 4261970
    Abstract: A Theophylline sustained release granule comprises 10 to 45 wt. % of Theophylline, 30 to 60 wt. % of a metal salt of higher fatty acid and 0.5 to 10 wt. % of ethyl cellulose at a ratio of 1:1 to 1:3 by weight of Theophylline to said metal salt of higher fatty acid.The Theophylline sustained release granule is effective for maintaining a suitable concentration of Theophylline in blood for a long time.
    Type: Grant
    Filed: January 2, 1980
    Date of Patent: April 14, 1981
    Assignee: Nikken Chemicals Co., Ltd.
    Inventors: Keizaburo Ogawa, Tadashi Ukigaya, Satoru Tanaka