Patents by Inventor Toshizo Abe

Toshizo Abe 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).

  • Preparation of propylene polymer-containing solid titanium trichloride and propylene polymers using same
    Patent number: 4200717
    Abstract: A solid titanium trichloride, produced by precipitation from a homogeneous solution or mixture with an ether, is treated by prepolymerization with propylene at a partial pressure of less than 1 kg/cm.sup.2. The pretreated titanium trichloride containing a propylene polymer is then admixed with an organoaluminum compound and the admixture is used as a catalyst in the polymerization of propylene.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: April 29, 1980
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Toshizo Abe, Nobuaki Goko, Yasuhiro Nishihara, Yukimasa Matuda
  • Process for polymerizing olefin
    Patent number: 4008358
    Abstract: A process for polymerizing an olefin comprises effecting said polymerization in contact with a catalyst of a combination of a first solid component prepared by treating a mixture of (a) a titanium tetrahalide, (b) a vanadyl alcoholate and (c) a vanadyl trihalide, with an organoaluminum compound, and a second component of an organoaluminum compound.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: February 15, 1977
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Toshizo Abe, Seiho Sakamoto, Yasuhiro Nishihara, Hidetoshi Saruwatari