Patents by Inventor Tokuo Makishima, deceased

Tokuo Makishima, deceased 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).

  • Block copolymers having ethylene-propylene copolymer blocks and methacrylate ester polymer blocks
    Patent number: 4921901
    Abstract: A novel block copolymer is disclosed which includes a random ethylene-propylene copolymer segment (A) and a methacrylate segment (B). The block copolymer has a number-average molecular weight of about 1,000 to about 600,000 and a ratio of (A) to (B) of 15/85 to 97/3 by weight.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: May 1, 1990
    Assignee: Toa Nenryo Kogyo KK
    Inventors: Satoshi Ueki, Tokuo Makishima, deceased, Chihiro Imai
  • Process for producing a modified styrene polymer
    Patent number: 4912170
    Abstract: This invention relates to a p-methyl styrene polymer represented by the following formula: ##STR1## Z denotes a group such as a functional group. Poly p-methylstyrene (PPMS) is lithiated by reaction with n-butyllithium. The lithiated PPMS is used to prepare polymers containing functional groups. As an example, a solution of PPMS (MW 260,000), 1.0 g in 20 ml of cyclohexane, was reacted with n-butyllithium, 8.5 mmol, and tetramethylethylenediamine, 8.7 mmol, for 20 hours to obtain a precipitate. The precipitate was dissolved in THF, and CO.sub.2 was blown into the solution. The solution was washed with an aqueous solution of HCl and dropped into methanol to obtain a solid polymer having carboxyl group functionality.
    Type: Grant
    Filed: December 22, 1988
    Date of Patent: March 27, 1990
    Assignee: Toa Nenryo Kogyo K.K.
    Inventors: Tadashi Niwa, Masayuki Kato, Yoshio Taguchi, Chihiro Imai, Tokuo Makishima, deceased, by Nobuko Makishima, legal representative
  • Block copolymer containing block from tetrahydrofuran
    Patent number: 4801654
    Abstract: A block copolymer is disclosed which includes an ethylene-propylene copolymer segment (A) and a tetrahydrofuran segment (B). The weight ratio of (A) to (B) is 5/95 to 95/5, and the block copolymer has a number-average molecular weight of about 1,000 to about 1,000,000.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: January 31, 1989
    Assignee: Toa Nenryo Kogyo K.K.
    Inventors: Tokuo Makishima, deceased, by Nobuko Makishima, legal representative, Satoshi Ueki, Chihiro Imai
  • Block copolymer containing tetrahydrofuran block
    Patent number: 4705830
    Abstract: A block copolymer is disclosed which includes an ethylene-propylene copolymer segment (A) and a tetrahydrofuran segment (B). The weight ratio of (A) to (B) is 5/95 to 95/5, and the block copolymer has a number-average molecular weight of about 1,000 to about 1,000,000.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: November 10, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tokuo Makishima, deceased, by Nobuko Makishima, legal representative, by Satoshi Ueki, legal representative, by Chichiro Imai, legal representative
  • Block copolymer containing a methacrylate ester block
    Patent number: 4704433
    Abstract: A novel block copolymer is disclosed which includes a random ethylene-propylene copolymer segment (A) and a methacrylate segment (B). The block copolymer has a number-average molecular weight of about 1,000 to about 600,000 and a ratio of (A) to (B) of 15/85 to 97/3 by weight.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: November 3, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Satoshi Ueki, Chihiro Imai, Tokuo Makishima, deceased
  • Methylstyrene maleimide copolymer
    Patent number: 4683275
    Abstract: A copolymer of p-methylstyrene and N-substituted maleimide exhibits high temperature stability.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: July 28, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Masayuki Kato, Yoshio Taguchi, Chihiro Imai, Tokuo Makishima, deceased
  • Catalyst component for polymerization of olefins
    Patent number: 4647550
    Abstract: A catalyst component for the polymerization of olefins which is prepared by contacting a contact reaction product of (a) a metal oxide, (b) an organic magnesium compound, and (c) an alkoxy group-containing compound held in contact with (d) a titanium compound.
    Type: Grant
    Filed: July 31, 1985
    Date of Patent: March 3, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tadanao Kohora, Satoshi Ueki, Mamoru Tachikawa, Chihiro Imai, Tokuo Makishima, deceased
  • Polypropylene composition
    Patent number: 4634740
    Abstract: A polypropylene composition having superior clarity and good low-temperature impact resistance, said composition comprising 65 wt % to 95 wt % crystalline polypropylene and 5 wt % to 35 wt % of ethylene-propylene random copolymer containing higher than 70 wt % to 85 wt % of ethylene.
    Type: Grant
    Filed: April 8, 1985
    Date of Patent: January 6, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Yuji Fujita, Tadao Ikeda, Tokuo Makishima, deceased