Patents Assigned to Diamond Shamrock (Polymers) Limited
  • Resin chelates
    Patent number: 4217417
    Abstract: Complexes of metals with chelating resins are described. In the principal embodiment the complex is a complex of a resin, an enzyme and a metal that is in non-ionic form and that is chelated by the resin and the enzyme. Such material is of particular value for converting dextrin to glucose. In another embodiment a solid agricultural composition is formed comprising a complex of an agriculturally acceptable trace metal chelated by a chelating resin and finely divided solid carrier.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: August 12, 1980
    Assignee: Diamond Shamrock (Polymers) Limited
    Inventor: Robert L. Smith
  • Nitrate selective amidine ion exchange resins
    Patent number: 4134861
    Abstract: Water swellable ion exchange resins comprising a polymeric matrix and amidine groups are described together with their synthesis. The preferred amidine groups are nitrate selective and methods of selectively removing nitrate from water are also described.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: January 16, 1979
    Assignee: Diamond Shamrock (Polymers) Limited
    Inventor: Lubor Roubinek