Patents Examined by Vincent D. Turner
  • Insecticidal compositions employing certain block copolymers
    Patent number: 4065555
    Abstract: Slow release biocidal generators having a greater degree of flexibility with regard to generator size and release of biocide therefrom comprise a volatile liquid beta-halovinyl phosphate biocide dispersed in a blend of a block polymer and a plasticized vinyl chloride resin. The generators are insecticidally active.
    Type: Grant
    Filed: May 15, 1972
    Date of Patent: December 27, 1977
    Assignee: Shell Oil Company
    Inventor: Richard C. Potter