Patents Assigned to Polydex Chemicals Ltd.
  • Tissue culture and cell growth-promoting material and its method of manufacture
    Patent number: 4520107
    Abstract: This invention relates to a novel cell growth-promoting material for use as a supplement to basal tissue culture media for the cultivation of animal cells in vitro and to the method for its preparation. More particularly, it relates to an infusion consisting of growth-promoting material from adult, calf or fetal bovine blood clots as a supplement to basal media for cultivation of animal cells in vitro.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: May 28, 1985
    Assignee: Polydex Chemicals Ltd.
    Inventors: George M. Healy, Kenneth D. Curry
  • Process for the separation and purification of dextranase
    Patent number: 4490470
    Abstract: This invention relates to a novel process for the separation, purification and recovery of dextranase from impure solutions such as fermentation broth by precipitating a complex of dextranase with tannic acid and thereafter separating the purified dextranase from the tannic acid.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: December 25, 1984
    Assignee: Polydex Chemicals Ltd.
    Inventor: Anthony L. Tosoni