Patents by Inventor Kazuo Hiraizumi

Kazuo Hiraizumi 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).

  • Patent number: 4680552
    Abstract: A measuring apparatus for measuring the number and size of impurities such as dust and bacteria in super-pure water includes a sealed container; a sample supply line which sealingly interconnects a source of super-pure water with the sealed container and supplies a sample mixture of super-pure water and electrolyte to the sealed container; an overflow pipe which sealingly connects with the side of the sealed container; a negative electrode which extends into the sample mixture in the sealed container; a hollow sensor which extends into the sample mixture in the sealed container, the hollow sensor containing a positive electrode surrounded by electrolyte and having a small hole at its lower end; and a detecting circuit connected to said negative and positive electrodes for supplying a certain DC current therebetween and detecting voltage pulses caused by impurities passing through the small hole into the hollow sensor.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: July 14, 1987
    Assignees: Erma Optical Works, Ltd., Ulvac Service Corporation
    Inventors: Kozo Shirato, Kazuo Hiraizumi, Kazuyasu Kawashima, Shinya Okuyama, Masashi Kobayashi, Minoru Tanaka, Akira Takeya, Yoshio Yamamoto, Yasuo Koyama, Satoshi Shinohara, Toru Yunoki
  • Patent number: 4652364
    Abstract: An apparatus for adjusting concentration of a solution comprises a plurality of semipermeable membrane tubes located within a container, a liquid A supply pipe connected to the container and communicating with the interior of said semipermeable membrane tubes and a liquid B supply pipe connected to said container to communicate with the exterior of the tubes.
    Type: Grant
    Filed: January 3, 1986
    Date of Patent: March 24, 1987
    Assignee: Erma Inc.
    Inventors: Kozo Shirato, Kazuo Hiraizumi, Masashi Kobayashi, Kazuyasu Kawashima
  • Patent number: 4629561
    Abstract: A liquid chromatograph includes a solvent tank, a pump, a sample injection element, a column, a detector, conduits for successively interconnecting these elements, and a flow controller which is connected between the pump and the detector and in parallel with the column.
    Type: Grant
    Filed: February 20, 1985
    Date of Patent: December 16, 1986
    Assignee: ERMA Optical Works, Ltd.
    Inventors: Kozo Shirato, Kazuo Hiraizumi, Akio Kaneko, Akihiko Nagai
  • Patent number: 4469495
    Abstract: A degassifying apparatus for removing air or other dissolved gas from liquid comprises a degassifying tank placed under at least a partial vacuum. The apparatus also includes a coiled tube having a plurality of turns in a generally spiral configuration which is positioned within the tank. Spacer elements are positioned between adjacent coiled turns of the tube and/or between the tube and an inner wall of the tank to eliminate contact between the tube and the tank and to thereby maximize the total surface area of the tube which is exposed to the decompressed atmosphere within the tank. This provides a highly desirable and advantageous degassifying effect to the liquid being conducted through the tube.
    Type: Grant
    Filed: March 18, 1983
    Date of Patent: September 4, 1984
    Assignee: Erma Optical Works, Ltd.
    Inventors: Kazuo Hiraizumi, Kozo Shirato, Kazuyasu Kawashima
  • Patent number: 4126393
    Abstract: Disclosed herein is a high-sensitivity differential refractometer which is characterized by having a light source disposed outside a housing, a reflecting mirror attached at the end portion thereof to a reflecting mirror-supporting plate connected with the end of a movable plate, said movable plate being so constructed as to rotate around a vertical axis and permit free change of the angle formed between said reflecting mirror-supporting plate and the movable plate, a twisting member disposed inside a lead-in tube and said lead-in tube fastened to a removable case and built in a metallic block inside the housing.
    Type: Grant
    Filed: February 25, 1977
    Date of Patent: November 21, 1978
    Assignees: Showa Denko K. K, Erma Optical Works, Ltd.
    Inventors: Sadao Sumikama, Shigeru Nakamura, Kozo Shirato, Kazuo Hiraizumi, Nobuo Takasu, Mitsuru Taguchi, Tsuyoshi Yamada, Susumu Ishiguro