Patents by Inventor Michael V. Markus

Michael V. Markus has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cation-exchange resins and use as membranes in electrolytic cells
    Patent number: 4602045
    Abstract: Process of radiation graft polymerizing a fluorinated unsaturated carboxylic acid monomer to a fluoropolymeric permselective membrane in order to improve its performance when used in an electrolysis cell.
    Type: Grant
    Filed: May 9, 1985
    Date of Patent: July 22, 1986
    Assignee: ICI Australia Limited
    Inventors: Michael V. Markus, George H. Barnett
  • Microporous hydrophilic fluoropolymer membranes and method
    Patent number: 4506035
    Abstract: An hydrophilic microporous diaphragm comprising a fluorine-containing substrate to which has been radiation co-grafted a mixture of monomers comprising at least one functional monomer of formula I, CF.sub.2 .dbd.CF(CF.sub.2).sub.n A, formula II, CF.sub.2 .dbd.CF--O--(CFX--CFX).sub.m A, a dicarboxylic acid containing the group of formula III, --R.sup.3 (COOH)--R.sup.4 (COOH)--, and at least one non-functional monomer of formula IV, CY.sub.2 .dbd.CYZ, or formula V ##STR1## wherein the molar ratio of co-grafted functional monomer to non-functional monomer is in the range of 2:1 to 1:20. These diaphragms have enhanced wettability for improved performance in chlor-alkali cells.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: March 19, 1985
    Assignee: ICI Australia Limited
    Inventors: George H. Barnett, Michael V. Markus
  • Polymerization process
    Patent number: 4481306
    Abstract: A process of preparing cation exchange resins by radiation grafting with copolymerization onto a perhalogenated fluorine-containing hydrocarbon polymer at least one functional monomer of formulaCF.sub.2 .dbd.CF(CF.sub.2).sub.n A orCF.sub.2 .dbd.CF-O(CFX-CFX).sub.m Aand at least one non-functional monomer of formula CF.sub.2 .dbd.CFY, and optionally in the presence of a polymerization inhibitor and a chain transfer agent.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: November 6, 1984
    Assignee: ICI Australia Limited
    Inventors: Michael V. Markus, George H. Barnett
  • Ion exchange resins
    Patent number: 4385130
    Abstract: A cation exchange resin, suitable for use as a membrane in electrolysis cells, comprising a perhalogenated fluorine containing hydrocarbon polymeric substrate with pendant active side chains containing dicarboxylic acid groups or their derivatives, and method of preparation thereof.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: May 24, 1983
    Assignee: ICI Australia Limited
    Inventors: Tadeusz F. Molinski, Michael V. Markus