Patents by Inventor Ian H. McEwan

Ian H. McEwan 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).

  • Two-step copolymerization process by controlling the temperature to prepare copolymer latex containing hard and soft monomer components
    Patent number: 4305859
    Abstract: Improved process for the preparation of aqueous emulsions of addition copolymers having functional groups to provide thermosetting capability via condensation. The process improvement resides in reducing the amount of unwanted premature condensation of the functional group. The process has two steps, one consisting of polymerizing a portion of the monomer reactants at a temperature not above 60.degree. C. if the functional group is present and the other of continuing the polymerization with the addition of the remaining monomer reactants at a temperature not above 60.degree. C. and at a pH in the range of from 1 to 7. The process is of use in producing improved thermosetting enamels.
    Type: Grant
    Filed: October 23, 1979
    Date of Patent: December 15, 1981
    Assignee: Canadian Industries Limited
    Inventors: Ian H. McEwan, Manubhai B. Patel
  • Aqueous thermosettable coating compositions comprising aqueous copolymer latex, amine neutralized copolymer and melamine-formaldehyde resin
    Patent number: 4215027
    Abstract: Aqueous thermosetting coating compositions comprising a blend of (1) an aqueous latex of an acrylic copolymer, (2) an amine-neutralized acrylic copolymer, and (3) a melamine-formaldehyde resin.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: July 29, 1980
    Assignee: Canadian Industries Limited
    Inventors: Robert L. Heppolette, Hamid I. Khan, Ian H. McEwan