Patents by Inventor Kunio Sakashita

Kunio Sakashita 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).

  • Leak detection method for gas, steam or the like based, in part, on the measurement of wind direction and velocity
    Patent number: 5390530
    Abstract: A leak detection system for gas, steam or the like in a plant yard includes a plurality of sampling modules and wind direction and velocity indicators both arranged around apparatus or equipment in the plant yard. Samples of the atmosphere around the apparatus or equipment are drawn through the sampling modules, and the concentration of a substance leaked into the atmosphere is detected by a sensor module. At the same time, the direction and velocity of wind in the plant yard are determined. Leakage of gas, steam or the like in the plant yard can be detected based on the concentrations and wind direction and velocity. Methods for the determination of the direction and/or velocity of wind, wind direction and velocity indicators, and anemoscopes are also described.
    Type: Grant
    Filed: October 5, 1993
    Date of Patent: February 21, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Hosonuma, Teruyuki Onodera, Saburoh Takahashi, Kunio Sakashita, Yoshinori Hiroshige
  • Leak detection system for gas, steam or the like that involves multi-point sampling
    Patent number: 5297421
    Abstract: A leak detection system for gas, steam or the like in a plant yard includes a plurality of sampling modules and wind direction and velocity indicators both arranged around apparatus or equipment in the plant yard. Samples of the atmosphere around the apparatus or equipment are drawn through the sampling modules, and the concentration of a substance leaked into the atmosphere is detected by a sensor module. At the same time, the direction and velocity of wind in the plant yard are determined. Leakage of gas, steam or the like in the plant yard can be detected based on the concentrations and wind direction and velocity. Methods for the determination of the direction and/or velocity of wind, wind direction and velocity indicators, and anemoscopes are also described.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: March 29, 1994
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Akira Hosonuma, Teruyuki Onodera, Saburoh Takahashi, Kunio Sakashita, Yoshinori Hiroshige
  • Process for the production of highly concentrated phosphoric acid
    Patent number: 4797265
    Abstract: A process for the production of highly concentrated phosphoric acid, comprises improvements in digesting phosphate rock with a mixed acid consisting essentially of sulfuric acid and phosphoric acid to obtain a slurry comprising phosphoric acid and hemihydrate (CaSO.sub.4.1/2H.sub.2 O), then filtering the slurry, taking out highly concentrated phosphoric acid as product acid and subsequently hydrating the hemihydrate to obtain gypsum (dihydrate: CaSO.sub.4.2H.sub.2 O).
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: January 10, 1989
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Tadashi Inoue, Akira Ohkoba, Kunio Sakashita, Akira Utsunomiya, Takeki Shinozaki, Minoru Ieda