Patents by Inventor Kiyoshi Nara

Kiyoshi Nara 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).

  • Cleaning tool for optical connector
    Patent number: 6810552
    Abstract: A cleaning tool for an optical connector includes a cylindrical cleaner and a holding member for holding a proximal portion of the cleaner. The cleaner has a main body with a ferrule insertion hole extending from a ferrule insertion port at its distal end face toward the proximal end of the cleaner. The ferrule insertion hole has an inner diameter substantially the same as an outer diameter of a ferrule. The ferrule insertion hole is surrounded by a rough surface so as to clean an outer surface of the ferrule which is to be inserted.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: November 2, 2004
    Assignee: NTT Advanced Technology Corporation
    Inventors: Taisei Miyake, Ai Fukuhara, Hitoshi Goto, Kazuya Sawa, Kiyoshi Nara
  • Cleaning tool for optical connector
    Publication number: 20020166190
    Abstract: A cleaning tool for an optical connector includes a cylindrical cleaner and a holding member for holding a proximal portion of the cleaner. The cleaner has a main body with a ferrule insertion hole extending from a ferrule insertion port at its distal end face toward the proximal end of the cleaner. The ferrule insertion hole has an inner diameter substantially the same as an outer diameter of a ferrule. The ferrule insertion hole is surrounded by a rough surface so as to clean an outer surface of the ferrule which is to be inserted.
    Type: Application
    Filed: March 28, 2002
    Publication date: November 14, 2002
    Inventors: Taisei Miyake, Ai Fukuhara, Hitoshi Goto, Kazuya Sawa, Kiyoshi Nara
  • Hydraulic composition, formed products therefrom and segregation reduction agent for hydraulic substances
    Patent number: 5174821
    Abstract: This invention provides a hydraulic composition which contains a cementitious material in powder form, .beta.-1,3-glucan, and a superplasticizer. The composition makes it possible to prepare concrete with high resistance to segregation, high fluidity, and excellent filling ability. Because of this, vibration of the concrete is not necessary during casting; it can simply be poured.
    Type: Grant
    Filed: April 29, 1992
    Date of Patent: December 29, 1992
    Assignees: Taisei Corporation, Takeda Chemical Industries, Ltd.
    Inventors: Yasunori Matsuoka, Takefumi Shindoh, Kazunao Yokota, Takafumi Naito, Akira Haze, Kiyoshi Nara
  • Production of monomeric human .gamma.-interferon
    Patent number: 4686284
    Abstract: Monomeric human .gamma.-interferon is efficiently produced by subjecting crude human .gamma.-interferon to gel filtration in the presence of a reducing sulfur compound and a protein-denaturing agent.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: August 11, 1987
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Nara, Susumu Honda
  • Method for separating cephalosporins
    Patent number: 4535155
    Abstract: The interseparating of desacetyl-cephalosporin C, desacetoxy-cephalosporin C and cephalosporin C can be accomplished by adsorbing these available cephalosporins on activated carbon and effecting a fractional elution thereof with water containing 0 to 20 percent (V/V) of an organic solvent or solvents.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: August 13, 1985
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Nara, Kazuyoshi Katamoto, Kazuhiko Ohta
  • Method for concentrating .beta.-lactam antibiotic solution
    Patent number: 4455306
    Abstract: The present invention relates to a method for concentrating a dilute aqueous solution of a .beta.-lactam antibiotic which is readily susceptible to heat, by subjecting a dilute aqueous solution of a .beta.-lactam antibiotic, said solution containing 2 to 20% (v/v) of a lower alcohol, to concentration by means of a permeable membrane made of poly(ether/amide) or polybenzimidazolone.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: June 19, 1984
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Nara, Kazuyoshi Katamoto, Sadao Ohkido, Isao Yamamoto, Hiroshi Yanome
  • Ultrafiltration of fermentation broth containing nucleosides to separate inosine and guanosine from the broth
    Patent number: 4374981
    Abstract: Inosine and/or guanosine can be separated from fermentation broth containing microbial cells and high-molecular-weight substances by heat-treating said broth at 90.degree. to 110.degree. C., followed by subjecting to ultrafiltration. The present process is advantageously carried out in the industrial use of ultrafiltration.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: February 22, 1983
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Masahiko Tsuda, Kazuhiko Ohta, Kiyoshi Nara
  • Method for preparing antibiotic P-2563 using Pseudomonas fluorescens
    Patent number: 4108724
    Abstract: A novel antibiotic P-2563 is produced by cultivating a microorganism of the genus Pseudomonas.The antibiotic is useful as a drug for the treatment of pustule, and also useful as a disinfectant.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: August 22, 1978
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kiyoshi Nara, Yasuhiro Sumino, Mitsuko Asai, Shunichi Akiyama
  • Production of deacetoxycephalosporin C
    Patent number: 3979260
    Abstract: Deacetoxycephalosporin C can be produced with advantage by fermentation of a microorganism which belongs to the genus Streptomyces, Cephalosporium, Emericellopsis, Paecilomyces, Anixiopsis, Arachnomyces or Spriroidium and is capable of producing deacetoxycephalosporin C. Deacetoxycephalosporin C is a useful antibiotic as such or can be used as a starting material for the production of other various cephalosporin antibiotics.
    Type: Grant
    Filed: June 14, 1974
    Date of Patent: September 7, 1976
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Yoshio Nakao, Kazuaki Kitano, Kazuhiko Kintaka, Shigeru Suzuki, Kazuyoshi Katamoto, Kiyoshi Nara