Patents by Inventor Mamoru Katagiri

Mamoru Katagiri 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).

  • Apparatus for both single and double injection molding
    Patent number: 5219586
    Abstract: Single and double injection molding using a single molding machine is made possible by providing two injection units, each having an injection nozzle, and a stationary platen three insertion holes into which the nozzles can fit. For double injection, the injection units are moved transversely of the stationary platen so as to orient both injection nozzles with a respective one of the insertion holes. For single injection, the injection units again are moved transversely of the stationary platen so as to orient one of the injection nozzles with one of the insertion holes, with the other nozzle not being so oriented.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: June 15, 1993
    Assignees: The Japan Steel Works Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Yukihiro, Mamoru Katagiri
  • Method of both single and double injection molding
    Patent number: 5183621
    Abstract: Single and double injection molding using a single molding machine is made possible by providing two injection units, each having an injection nozzle, and a stationary platen three insertion holes into which the nozzles can fit. For double injection, the injection units are moved transversely of the stationary platen so as to orient both injection nozzles with a respective one of the insertion holes. For single injection, the injection units again are moved transversely of the stationary platen so as to orient one of the injection nozzles with one of the insertion holes, with the other nozzle not being so oriented.
    Type: Grant
    Filed: February 14, 1991
    Date of Patent: February 2, 1993
    Assignees: The Japan Steel Works, Ltd., Matsushita Electric Industrial Co., Ltd.
    Inventors: Makoto Yukihiro, Mamoru Katagiri
  • Spherical amino acid preparation
    Patent number: 4675339
    Abstract: The present invention relates to a spherical amino acid having an average particle size of about 1 mm or below and a process for the preparation thereof.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: June 23, 1987
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Yoshimi Inoue, Mamoru Seki, Mamoru Katagiri, Hiroaki Nishiyama, Zenji Ogawa
  • Process for producing optically active phenylalanine
    Patent number: 4582928
    Abstract: This invention relates to a process for producing optically active phenylalanine, characterized by optically resolving DL-phenylalanine.optically active mandelic acid complexes in an aqueous solvent in the presence of an acidic compound having a pKa value of 0.90 to 2.10 and isolating optically active phenylalanine from the obtained optically active phenylalanine.optically active mandelic acid complex.According to the process of the present invention, it is possible to decrease the amount of a mother liquor of resolution to 1/5 to 1/10 of that when no acidic compound is used and to obtain optically active phenylalanine having an optical purity of as high as 96.5% or above without a step of optical purification when optically active phenylalanine is isolated from the obtained optically active phenylalanine.optically active mandelic acid complex.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: April 15, 1986
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Shigeru Aoki, Mamoru Katagiri, Ryoichi Hasegawa, Akikazu Mitsunobu, Yasuhisa Tashiro