Patents by Inventor Hisato Saitoh

Hisato Saitoh 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: 5039328
    Abstract: A process for producing a granular slow-acting nitrogenous fertilizer, which comprises blending an aqueous methylol urea solution to a urea-isobutyraldehyde condensate powder or a mixture thereof with a urea-formaldehyde condensate powder, and granulating the resulting blend while subjecting the methylol urea to dehydration condensation under an acidic condition to form a urea-formaldehyde condensate.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: August 13, 1991
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Hisato Saitoh, Noboru Abe, Takahiro Watanuki
  • Patent number: 4895983
    Abstract: A process for producing a methylol urea solution which comprises carrying out addition reaction between urea and formaldehyde in the presence of water and an alkali, wherein said alkali is a polyphosphoric acid salt; and a process for producing a slow-releasing nitrogenous fertilizer which comprises subjecting the resulting methylol urea solution to dehydration condensation and drying the resulting condensate are disclosed. The methylol urea solution undergoes no substantial pH variation with time either during or after the addition reaction, and the fertilizer obtained therefrom is excellent in slow-releasing properties.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: January 23, 1990
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Kiyoshi Nakayama, Hiroshi Aoki, Hisato Saitoh
  • Patent number: 4770460
    Abstract: A small motor vehicle such as a motorcycle having a front fairing with the radiator, engine and the like positioned therein. A front fender is provided which includes a peripheral portion positioned about a portion of the front wheel and extending fore-and-aft between the struts of a front fork. The fender further includes side plates including narrow upper portions extending to just outwardly of the front fork and lower portions. The lower portions extend outwardly and rearwardly to lie in a streamline aligned with the lower sides of the vehicle fairing. Further edge portions extend downwardly from the peripheral portion of the fender rearwardly of the front fork so as to create an appropriate fender well.
    Type: Grant
    Filed: January 27, 1987
    Date of Patent: September 13, 1988
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Tamotsu Miura, Hisato Saitoh
  • Patent number: D285185
    Type: Grant
    Filed: January 31, 1983
    Date of Patent: August 19, 1986
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Minoru Morioka, Hisato Saitoh