Patents by Inventor Kazuhiko Yamatoya

Kazuhiko Yamatoya 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).

  • Drug delivery system using galactoxyloglucan
    Patent number: 6245354
    Abstract: The present invention relates to a pharmaceutical sustained release preparation prepared by using as a sustained release ingredient a partial degradation product of the galactose of a galactoxyloglucan and a method for sustained releasing of a drug thereby. In more detail, it relates to a pharmaceutical sustained release preparation, wherein the sustained release of a drug is effected by utilizing the thermally reversible gel characteristics of the galactose-partial degradation product, which is produced by partial removal of the galactose on the side-chain of a galactoxyloglucan with an enzyme.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: June 12, 2001
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Shozo Miyazaki, Mayumi Shirakawa, Kazuhiko Yamatoya
  • Ectoine synthase gene
    Patent number: 5932781
    Abstract: The nucleotide sequence of a DNA coding for ectoine synthase has been determined by isolating a gene coding for an enzyme involved in the biosynthesis of ectoine in the form of a DNA comprising about 4.2 kilobase pairs which is obtained from Halomonas sp. KS-3 by cleaving with restriction endonucleases EcoRI and SalI. By introducing the obtained gene DNA into E. coli, it is possible to provide the capability of biosynthetizing ectoine and the characteristic of high osmotic tolerance, thus permitting the development of an efficient fermentation technique utilizing the resultant transformant and the creation of plants having high resistance to drought.
    Type: Grant
    Filed: May 9, 1996
    Date of Patent: August 3, 1999
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Mitsuo Takano, Hisayo Ono, Hiroyuki Yamada, Kazuhiko Yamatoya
  • Agent for inducing phytoalexin and method for inducing phytoalexin
    Patent number: 5602111
    Abstract: An agent for inducing a phytoalexin comprising a xyloglucan-oligosaccharide as an active ingredient thereof and a method for inducing a phytoalexin in a plant body comprising an application of a xyloglucan-oligosaccharide to the plant. The present invention is useful for promoting growth of a plant and maintaining freshness of a plant while a crop has been grown, or a vegetable or a fruit has been transported and/or stored.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: February 11, 1997
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Akira Misaki, Keiji Sekiya, Kazuhiko Yamatoya
  • Polysaccharides of hymenaea seeds
    Patent number: 5488105
    Abstract: A polysaccharide extracted from seeds of a Hymenaea having the following properties: (1) A molecular weight of 5,000-2,000,000, (2) constituent sugars including arabinose, galactose, xylose and glucose, and (3) a main chain of .beta.-1,4-glucan. The polysaccharides are useful as a thickener, a gelatinizer, a stabilizer for suspension or emulsion, and the like in the field of foods, chemicals and medicaments.
    Type: Grant
    Filed: October 14, 1993
    Date of Patent: January 30, 1996
    Assignee: Dainippon Pharmaceutical Co., Ltd.
    Inventors: Yoichiro Uno, Fumio Takeno, Kazuhiko Yamatoya, Keiji Ohtsu