Patents by Inventor Tsugio Maejima

Tsugio Maejima 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).

  • Assemblage of hydroxyl apatite particles and liquid chromatography column using the same
    Patent number: 5037543
    Abstract: An assemblage of hydroxyl apatite particles having small and uniform particle size. The median of the particle size is 1 to 10 .mu.m, and at least 90% of the particles in the assemblage have a particle size of not more than 25 .mu.m. The assemblage can be used to pack a liquid chromatography column.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: August 6, 1991
    Assignee: Toa Nenryo Kogyo K.K.
    Inventors: Tsugio Maejima, Kimio Tamai, Tetsuo Kanakubo, Masao Yoshizawa, Nobuaki Tagaya, Hideyuki Kuwahara, Takao Hashimoto, Noriko Komatsu, Keiko Fukamachi
  • Method for manufacturing low pour point petroleum product with zeolite TSZ
    Patent number: 4664775
    Abstract: This invention relates to a method for catalytically manufacturing a low pour point petroleum product from distillates of crude oil, and more particularly to a method for economically manufacturing a low pour point petroleum product, such as the insulating oil, the lubricating oil used for various types of freezing devices, or the base oil for such lubricating oil, from a paraffin-based crude oil as the starting material without using any special rare crude oil such as naphthene-based crude oil. The catalyst comprises zeolite TSZ.
    Type: Grant
    Filed: July 26, 1983
    Date of Patent: May 12, 1987
    Assignee: TOA Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tsugio Maejima, Wataru Kobayashi, Kenji Ashibe, Nobuaki Tagaya, Satoshi Sakurada