Patents by Inventor Helen Margaret Hyde

Helen Margaret Hyde 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).

  • Wet state preservation of mineral slurries
    Patent number: 8317912
    Abstract: The present invention relates to an antimicrobial composition comprising an isothiazolin-3-one, such as 1,2-benzisothiazolin-3-one, a zinc compound selected from zinc salts, zinc oxide, zinc hydroxide or combinations thereof, a pyrithione salt or pyrithione acid, and a surfactant selected from the group consisting of (i) an anionic surfactant having a sulfate or sulfonate moiety attached to a straight or branched chain containing from about 10 to about 18 atoms at the backbone of the chain, (ii) an anionic surfactant being an alkylaryl sulfonic acid or salt thereof wherein the alkyl portion contains from about 10 to about 18 carbon atoms, and the aryl portion contains a benzyl or substituted benzyl group, and combinations thereof. This composition is particularly effective in preventing the growth of various microorganisms in mineral slurries such as aqueous calcium carbonate slurries.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: November 27, 2012
    Assignee: Arch Chemicals, Inc.
    Inventors: Helen Margaret Hyde, Fitzgerald Clarke, Helmut Peters, Terri Williams
  • Wet State Preservation of Mineral Slurries
    Publication number: 20120247364
    Abstract: The present invention relates to an antimicrobial composition comprising an isothiazolin-3-one, such as 1,2-benzisothiazolin-3-one, a zinc compound selected from zinc salts, zinc oxide, zinc hydroxide or combinations thereof, a pyrithione salt or pyrithione acid, and a surfactant selected from the group consisting of (i) an anionic surfactant having a sulfate or sulfonate moiety attached to a straight or branched chain containing from about 10 to about 18 atoms at the backbone of the chain, (ii) an anionic surfactant being an alkylaryl sulfonic acid or salt thereof wherein the alkyl portion contains from about 10 to about 18 carbon atoms, and the aryl portion contains a benzyl or substituted benzyl group, and combinations thereof. This composition is particularly effective in preventing the growth of various microorganisms in mineral slurries such as aqueous calcium carbonate slurries.
    Type: Application
    Filed: March 9, 2012
    Publication date: October 4, 2012
    Inventors: Helen Margaret Hyde, Fitzgerald Clarke, Helmut Peters, Terri Williams