Patents by Inventor Ryutarou Tanaka

Ryutarou Tanaka 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 deacetylase from Vibrio cholerea IFO 15429
    Patent number: 5252468
    Abstract: A process for producing deacetylase which comprises incubating a deacetylase-producing bacterium belonging to Vibrio cholerae in a IFO 15429 culture medium containing a carbon source, a nitrogen source, an inorganic salt and an inducer for producing the deacetylase and isolating the deacetylase from cells separated from said culture medium.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: October 12, 1993
    Assignee: Agency of Industrial Science & Technology
    Inventors: Shizu Fujishima, Fumiko Yaku, Ryutarou Tanaka, Einosuke Muraki, Naoko Yamano
  • Process for preparing chitosan oligosaccharides
    Patent number: 4970150
    Abstract: A process for preparing a low-molecular weight chitosan which comprises adding chitosan to water containing a monobasic acid to prepare an intimate chitosan-water mixture and treating said mixture with cellulase.
    Type: Grant
    Filed: June 9, 1989
    Date of Patent: November 13, 1990
    Assignee: Agency of Industrial Science & Technology
    Inventors: Fumiko Yaku, Ryutarou Tanaka, Einosuke Muraki, Shizu Fujishima, Masaru Miya
  • N-acetyl-D-glucosamine deacetylase and a process for preparing the same
    Patent number: H1453
    Abstract: There are provided N-acetyl-D-glucosamine deacetylase capable of hydrolyzing acetamide group of N-acetyl-D-glucosamine to produce D-glucosamine and acetic acid, which has the following physicochemical properties:(1) Substrate specificity: N-acetyl-D-glucosamine monomer, not the oligomer or polymer thereof;(2) Optimal pH: 7.8-8.2 at 37.degree. C.;(3) Stable pH: 6.0-9.0 at 45.degree. C.;(4) Optimal temperature: 28.degree.-39.degree. C.;(5) Molecular weight: 70,000-200,000 as determined using TSK-gel G-3000 SW column,and a process for preparing the same using a microorganism belonging to Vibrio sp.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: June 6, 1995
    Inventors: Naoko Yamano, Shizu Fujishima, Ryutarou Tanaka