Patents Represented by Law Firm Oblon, Spivak, Spivak, McClelland, Maier & Neustadt
  • Removing and recovering plant polyphenols
    Patent number: 5141611
    Abstract: Polyphenolic substances such as food dyes, tannins, fruit juices and wine colorings are removed from a solution by adsorption onto a regeneratable adsorbent polyamide of extended surface and controlled porosity. The surface chemistry of the polyamide may be modified by a glutaraldehyde/resorcinol treatment. The polyphenolic substances are recovered by elution with water or other protonic solvent.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: August 25, 1992
    Assignee: Memtec Limited
    Inventor: Douglas L. Ford