Patents by Inventor Zenichi Mashino

Zenichi Mashino 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: 4539012
    Abstract: A composition in the form of a dispersion or a slurry, which comprises an aqueous medium, a finely divided pitch, and a specific dispersant of an amount sufficient for maintaining the pitch in the dispersed state. The dispersant is selected from (A) a compound of the formula shown below, (B) a polymeric material obtained by crosslinking the compound (A) with a crosslinking agent, (C) a salt of the sulfuric ester of the compound (A) and (D) a salt of the sulfuric ester of the polymeric material (B). The compound (A) is expressed as follows:Z--(Y--X).sub.pwherein Z is an organic radical capable of forming, together with p number of hydrogen atom, an active hydrogen-containing organic compound of the formula Z--(H).sub.p where H is the active hydrogen and p is a positive integer; Y is a polyoxyalkylene group consisting essentially of a plurality of monomer units, the monomer unit being at least one member selected from an ethylene oxide monomer unit (--CH.sub.2 --CH.sub.
    Type: Grant
    Filed: March 22, 1984
    Date of Patent: September 3, 1985
    Assignees: Nikka Chemical Industry Co., Ltd., Chiyoda Chemical Enginrng & Constrct. Co. Ltd.
    Inventors: Osamu Ohzeki, Katsuhiko Shimakawa, Zenichi Mashino
  • Patent number: 4537600
    Abstract: Molten pitch, such as obtained in petroleum refining, is comminuted as such in the presence of water to obtain coarse pitch particles solidified during the comminution by contact with the water. The coarse pitch particles are further pulverized in the presence of water and, preferably, a dispersant to form a slurry containing the finely pulverized pitch particles dispersed in the water.
    Type: Grant
    Filed: March 27, 1984
    Date of Patent: August 27, 1985
    Assignees: Chiyoda Chem. Engineering & Constr. Co., Nikka Chemical Industry Co., Ltd.
    Inventors: Hiroto Tajima, Hironori Kawakami, Zenichi Mashino, Seinoshin Hayami, Osamu Ohzeki