Patents by Inventor Isamu Harasawa

Isamu Harasawa 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).

  • Agricultural covering material
    Patent number: 5771630
    Abstract: The present invention provides an agricultural covering material comprising a fluororesin film which intercepts the transmission of the ultraviolet rays having a wavelength range of at least 300-330 nm, by at least 40% and which transmits at least 70% of the visible rays having a wavelength range of 400-800 nm.The covering material can be used outdoors in a spread state over a long period of time and is useful as a covering material for greenhouse to replace glass, for cultivation of various useful crops.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: June 30, 1998
    Assignee: Nippon Carbide Kogyo Kabushiki Kaisha
    Inventors: Isamu Harasawa, Yoshiaki Ishisaki, Yasuaki Oonishi
  • Simplified apparatus and method for measuring quantity of ultraviolet radiation received
    Patent number: 5075557
    Abstract: A simplified apparatus for measurement of receipt light quantity of ultraviolet radiation wherein a colored material is carried on a solid support which material discolors or fades in accordance with the receipt of light quantity due to light receipt of ultraviolet radiation having wavelength in the range of at least 300 to 360 nm, and a method for measurement of ultraviolet radiation having wavelength in the range of at least 300 to 360 nm in sunlight which comprises exposing the above measurement apparatus to sunlight and monitoring discoloration or fading of the colored material of the measurement apparatus to detect receipt light quantity of ultraviolet radiation of the wavelengths.
    Type: Grant
    Filed: February 6, 1990
    Date of Patent: December 24, 1991
    Assignee: Nippon Carbide Kogyo Kabushiki Kaisha
    Inventors: Isamu Harasawa, Yoshihisa Suzuki, Mitsuo Igami
  • Cultivation of phototrophic bacteria in the absence of ultraviolet light
    Patent number: 4467035
    Abstract: Cultivation of phototrophic bacteria such as in the treatment of organic wastes is carried out in a light field substantially free from ultraviolet light having a wavelength of not more than 340 nm. This process promotes growth of the phototrophic bacteria and improves quality of the resulting bacterial cell.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: August 21, 1984
    Assignee: Nippon Carbide Kogyo Kabushiki Kaisha
    Inventors: Isamu Harasawa, Yukio Hariki, Katsuhiko Maeda, Koichi Nakamura
  • Method for cultivating algae and a covering material used therefor
    Patent number: 4235043
    Abstract: A method for cultivating an alga, which comprises growing the alga in a light field substantially free from light of wavelengths of not more than 340 nm; and a covering material for use in the cultivation of algae, said covering material substantially inhibiting the transmission of light of wavelengths of not more than 340 nm.
    Type: Grant
    Filed: March 14, 1979
    Date of Patent: November 25, 1980
    Assignee: Nippon Carbide Kogyo Kabashiki Kaisha
    Inventors: Isamu Harasawa, Yukio Hariki, Katsuhiko Maeda, Kouichi Nakamura