Patents by Inventor Harold C. Fielding

Harold C. Fielding 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).

  • Perfluorinated intermediates which are useful in the production of organic polymeric materials and ion-exchange membrane
    Patent number: 5169983
    Abstract: An organic polymeric material, which is preferably perfluorinated and which comprises a polymeric chain and at least one group pendant from the chain, in which the group pendant from the chain comprises a saturated cyclic group and at least one ion-exchange group or group convertible thereto, and in which the ion-exchange group of group convertible thereto is linked to the polymeric chain through the cyclic group. Also an ion-exchange membrane produced from the polymeric material, an electrolytic cell containing the membrane, vinyl monomers from which the organic polymeric material may be produced and intermediates useful in production of the monomers.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: December 8, 1992
    Assignee: Imperial Chemical Industries PLC
    Inventors: Harold C. Fielding, Philip H. Gamlen, Ian M. Shirley
  • Organic polymeric material and ion-exchange membrane with pendant carbocyclic exchanging groups produced
    Patent number: 5001163
    Abstract: An organic polymeric material, which is preferably perfluorinated and which comprises a polymeric chain and at least one group pendant from the chain, in which the group pendant from the chain comprises a saturated cyclic group and at least one ion-exchange group or group convertible thereto, and in which the ion-exchange group or group convertible thereto is linked to the polymeric chain through the cyclic group. Also an ion-exchange membrane produced from the polymeric material, an electrolytic cell containing the membrane, vinyl monomers from which the organic polymeric material may be produced and intermediates useful in production of the monomers.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: March 19, 1991
    Assignee: Imperial Chemical Industries PLC
    Inventors: Harold C. Fielding, Philip H. Gamlen, Ian M. Shirley
  • Fluorinated compounds containing functional groups
    Patent number: 4154753
    Abstract: Surface-active products containing a highly fluorinated aliphatic substituent are prepared by nucleophilic attack of an oligomer of tetrafluoroethylene with an organic hydroxy compound in association with a proton acceptor.
    Type: Grant
    Filed: January 3, 1972
    Date of Patent: May 15, 1979
    Assignee: Imperial Chemical Industries Limited
    Inventor: Harold C. Fielding