Patents by Inventor Hiroshi Tsunekawa

Hiroshi Tsunekawa 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).

  • Carbon-fiber chopped strand and manufacturing method of the same
    Patent number: 9181640
    Abstract: Disclosed is a carbon-fiber chopped strand, and a manufacturing method of the same. The carbon-fiber chopped strand is composed of single filaments composed of 30,000-120,000 carbon fibers, and a sizing agent content 1-10% by weight that bundles the single filaments; the ratio of maximum diameter (Dmax) in the cross section and minimum diameter (Dmin) is 1.0-1.8, a length along a fiber direction is 3-10 mm, and a repose angle of 10-30°.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: November 10, 2015
    Assignee: TOHO TENAX CO., LTD.
    Inventors: Hiroshi Tsunekawa, Takao Saeki, Akio Yoshida
  • CARBON-FIBER CHOPPED STRAND AND MANUFACTURING METHOD OF THE SAME
    Publication number: 20120326342
    Abstract: Disclosed is a carbon-fiber chopped strand, and a manufacturing method of the same. The carbon-fiber chopped strand is composed of single filaments composed of 30,000-120,000 carbon fibers, and a sizing agent content 1-10% by weight that bundles the single filaments; the ratio of maximum diameter (Dmax) in the cross section and minimum diameter (Dmin) is 1.0-1.8, a length along a fiber direction is 3-10 mm, and a repose angle of 10-30°.
    Type: Application
    Filed: February 28, 2011
    Publication date: December 27, 2012
    Inventors: Hiroshi Tsunekawa, Takao Saeki, Akio Yoshida
  • Isolated nucleic acid encoding L-lysine: 2-oxoglutaric acid 6-aminotransferase
    Patent number: 7235388
    Abstract: Provided are an isolated gene capable of participating in the production of L-homoglutamic acid, and a production system of L-homoglutamic acid by using this gene. The gene is derived from the genome of Flavobacterium lutescens.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: June 26, 2007
    Assignee: Mercian Corporation
    Inventors: Tadashi Fujii, Takao Narita, Kuniho Nakata, Hitosi Agematu, Hiroshi Tsunekawa, Kunio Isshiki, Takeo Yoshioka
  • Gene participating in the production of homo-glutamic acid and utilization thereof
    Patent number: 6890746
    Abstract: Provided are an isolated gene capable of participating in the production of L-homoglutamic acid, and a production system of L-homoglutamic acid by using this gene. The gene is derived from the genome of Flavobacterium lutescens.
    Type: Grant
    Filed: August 4, 1999
    Date of Patent: May 10, 2005
    Assignee: Mercian Corporation
    Inventors: Tadashi Fujii, Takao Narita, Kuniho Nakata, Hitosi Agematu, Hiroshi Tsunekawa, Kunio Isshiki, Takeo Yoshioka
  • Gene participating in the production of homoglutamic acid and its use
    Publication number: 20040214295
    Abstract: Provided are an isolated gene capable of participating in the production of L-homoglutamic acid, and a production system of L-homoglutamic acid by using this gene. The gene is derived from the genome of Flavobacterium lutescens.
    Type: Application
    Filed: June 3, 2004
    Publication date: October 28, 2004
    Inventors: Tadashi Fujii, Takao Narita, Kuniho Nakata, Hitosi Agematu, Hiroshi Tsunekawa, Kunio Isshiki, Takeo Yoshioka
  • Process for producing L-2-aminoadipic acid
    Patent number: 5906927
    Abstract: A process for producing L-2-aminoadipic acid, which comprises converting an aminomethyl group of L-lysine into a carboxyl group by use of a culture of a microorganism of the genus Flavobacterium. By this process, L-2-aminoadipic acid can be obtained directly from L-lysine in a high yield. This process is a microbial method which is effective for the mass production.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: May 25, 1999
    Assignees: Mercian Corporation, Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kuniho Nakata, Takao Narita, Hiroshi Tsunekawa, Takeo Yoshioka
  • Optically active 1,4-dihydropyridine compounds and the microbial process for the stereoselection thereof
    Patent number: 5635395
    Abstract: (4R)-3-(Substituted aminoalkyl)oxycarbonyl-1,4-dihydro-2,6-dimethyl-4-(nitrophenyl)pyridine-5- carboxylic acids can be prepared efficiently, by reacting bis(substituted aminoalkyl) 1,4-dihydro-2,6-dimethyl-4-(nitrophenyl)pyridine-3,5-dicarboxylates with a microorganism capable of asymmetric hydrolysis and belonging to the genus Streptomyces, the genus Paecilomyces, the genus Botryodioplodia, the genus Alternaria or the genus Helminthosporium, or a treated product thereof. The compounds are extremely useful as important intermediates for preparation of pharmaceuticals useful for the prevention and treatment of angina pectoris, hypertension, etc.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: June 3, 1997
    Assignees: Mercian Corporation, Taisho Pharmaceutical Co., Ltd.
    Inventors: Kunio Isshiki, Takashi Nakashima, Takeo Yoshioka, Hiroshi Tsunekawa, Takashi Adachi, Tomomi Ota