Patents by Inventor Teruo Oikawa

Teruo Oikawa 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).

  • Alkali calcium silicates and process for preparation thereof
    Patent number: 4294810
    Abstract: Disclosed is an alkali calcium silicate having two different X-ray diffraction patterns: (1) with diffraction peaks at spacings (d) of 11.8-12.2 A, 6 A and 3 A or (2) with diffraction peaks at spacings (d) of 13.0-13.4 A, 6.7 A and 3.1 A. This silicate is in the fibrous or micaceous form and is valuable as a drying agent or an ion exchange agent. This silicate is prepared by hydrothermal reaction of an aqueous suspension having a specific composition of the starting components.
    Type: Grant
    Filed: February 27, 1980
    Date of Patent: October 13, 1981
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Genji Taga, Teruo Oikawa, Yoshiaki Watanabe
  • Alkali calcium silicates and process for preparation thereof
    Patent number: 4277457
    Abstract: Disclosed is an alkali calcium silicate having two different X-ray diffraction patterns (1) with diffraction peaks at spacings (d) of 11.8-12.2 A, 6 A and 3 A or (2) with diffraction peaks at spacings (d) of 13.0-13.4 A, 6.7 A and 3.1 A. This silicate is in the fibrous or micaceous form and is valuable as a drying agent or an ion exchange agent. This silicate is prepared by hydrothermal reaction of an aqueous suspension having a specific composition of the starting components.
    Type: Grant
    Filed: July 5, 1979
    Date of Patent: July 7, 1981
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Genji Taga, Teruo Oikawa, Yoshiaki Watanabe
  • Stroke length adjusting devices
    Patent number: 4041800
    Abstract: A stroke length adjusting device which can be applied to a mechanism for converting a rotary motion into a reciprocating motion is disclosed. The device comprises two oil pressure chambers communicated through a bore with each other and a crank arranged between these two oil pressure chambers. A pressure balance between the two oil pressure chambers permits the crank to displace in its axial direction so as to adjust a stroke length of the reciprocating motion.
    Type: Grant
    Filed: August 27, 1975
    Date of Patent: August 16, 1977
    Assignee: Nikkiso Co., Ltd.
    Inventors: Ryuichi Sato, Teruo Oikawa, Masahiro Nakata