Patents by Inventor by Nobuko Makishima, legal representative

by Nobuko Makishima, legal representative 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).

  • 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