Patents by Inventor Hisazi Matsui

Hisazi Matsui 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).

  • Method for drawing up special crude oil
    Patent number: 4756368
    Abstract: The present invention relates to a method for drawing up a crude oil containing a great amount of wax or a high-viscosity crude oil. The method of the present invention is characterized by cracking or fractionating the crude oil which has been drawn up, in order to prepare a cracked oil or a gas oil, and by drawing up the crude oil, while injecting a part of the cracked oil or the gas oil into an oil well. According to the present invention, an efficient drawing operation can be achieved.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: July 12, 1988
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Osaka Gas Company Limited
    Inventors: Yoshiaki Ikuta, Masayuki Moriwaki, Masato Kaneko, Hisazi Matsui