Patents Assigned to Iwao Tabushi
  • Heavy metal ion adsorbents
    Patent number: 4174428
    Abstract: A heavy metal ion adsorbent represented by the following general formula: ##STR1##wherein l, m, and n are 2 or 3, respectively; R is an alkyl group containing 4 to 6 carbon atoms which is substituted by an amino group in the .omega.-position; and A is hydrogen or a synthetic resin.
    Type: Grant
    Filed: January 30, 1978
    Date of Patent: November 13, 1979
    Assignee: Iwao Tabushi
    Inventors: Iwao Tabushi, Hidefumi Kato, Yoichi Taniguchi, Yasuhisa Kuroda
  • 12-Alkyl-1,4,7,10-tetraazacyclotridecane
    Patent number: 4174319
    Abstract: 12-alkyl-1,4,7,10-tetraazacyclotridecane of the formula ##STR1## wherein R is an alkyl group containing at least 8 carbon atoms. This compound can be used for capturing metal ions.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: November 13, 1979
    Assignee: Iwao Tabushi
    Inventor: Yoshiaki Kobuke
  • Polystyrene based polymers containing cyclodextrin derivatives, metal complexes of the same, and process for the production of the same
    Patent number: 4169079
    Abstract: A cyclodextrin derivative-containing a polystyrene based polymer containing units of structure having the formula: ##STR1## (wherein m is an integer of 1 to 10; n is 4, 5 or 6; R.sub.1 and R.sub.2 are hydrogen or alkyl groups containing 1 to 3 carbon atoms; and Z is an alkylene group containing 1 to 5 carbon atoms); a metal complex of the polystyrene based polymer; and a process for the production of the polystyrene based polymer or metal complex thereof.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: September 25, 1979
    Assignee: Iwao Tabushi
    Inventors: Iwao Tabushi, Nobuaki Shimizu, Kazuo Yamamura
  • Alkyl substituted cyclams
    Patent number: 4168265
    Abstract: Alkyl cyclam resulting from substitution of one or more hydrogens of the cyclam represented by the formula ##STR1## by alkyl groups containing at least 8 carbon atoms. The alkyl cyclam can be used for capturing metal ions.
    Type: Grant
    Filed: February 3, 1978
    Date of Patent: September 18, 1979
    Assignee: Iwao Tabushi
    Inventors: Iwao Tabushi, Mariko Fujiyoshi, Hidefumi Kato, Yasuhisa Kuroda