Patents by Inventor Ian M. Howarth

Ian M. Howarth 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).

  • Cementiferous compositions
    Patent number: 4524163
    Abstract: This invention provides plasticizer additive compositions, for use in cementiferous compositions, which enhance the early gain of compressive strength. The plasticizer additive compositions comprise an aqueous solution of a copolymer or salt thereof, comprising an ethylenically unsaturated monomer having a hydroxyl functional group and an accelerator additive.
    Type: Grant
    Filed: June 11, 1984
    Date of Patent: June 18, 1985
    Assignee: Internationale Octrooi Maatschappij "Octropa" B.V.
    Inventors: Geoffrey Bradley, John T. Hoarty, Ian M. Howarth