Patents by Inventor Iiona Lin

Iiona Lin 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).

  • Nonviscous aqueous dispersion compositions of water-swellable layered silicates and the method of producing the same
    Patent number: 7378466
    Abstract: Concentrated suspensions of smectite clays are obtained as either relatively “thin” or highly shear-thinning slurries that are easy to pump, by adding one or more of certain cationic polymers whose weight average molecular weight, Mw, is 50,000 or higher. It was found during the course of the invention that a cationic polymer with an Mw of 10,000 did not work, while the same polymer with a bimodal Mw of 50,000 and 30,000 worked satisfactorily. To achieve the full advantage of the present invention, the cationic polymer preferably has 1 to 10 milliequivalents of cationic charge per gram of the polymer, and more preferably 5 to 10 milliequivalents of cationic charge per gram of the polymer, and most preferably 6 to 8 milliequivalents of cationic charge per gram of the polymer.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: May 27, 2008
    Assignee: AMCOL International Corp.
    Inventors: Ashoke K. SenGupta, Jerald W. Darlington, Jr., Jennifer Gould, Iiona Lin
  • Nonviscous aqueous dispersion compositions of water-swellable layered silicates and the method of producing the same
    Publication number: 20040229991
    Abstract: Concentrated suspensions of smectite clays are obtained as either relatively “thin” or highly shear-thinning slurries that are easy to pump, by adding one or more of certain cationic polymers whose weight average molecular weight, Mw, is 50,000 or higher. It was found during the course of the invention that a cationic polymer with an Mw of 10,000 did not work, while the same polymer with a bimodal Mw of 50,000 and 30,000 worked satisfactorily. To achieve the full advantage of the present invention, the cationic polymer preferably has 1 to 10 milliequivalents of cationic charge per gram of the polymer, and more preferably 5 to 10 milliequivalents of cationic charge per gram of the polymer, and most preferably 6 to 8 milliequivalents of cationic charge per gram of the polymer.
    Type: Application
    Filed: November 12, 2003
    Publication date: November 18, 2004
    Applicant: AMCOL INTERNATIONAL CORPORATION, a Delaware corporation
    Inventors: Ashoke K. SenGupta, Jerald W. Darlington, Jennifer Gould, Iiona Lin