Patents by Inventor Stephen J. Allenson

Stephen J. Allenson 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).

  • Method for separating solids from water using amine containing polymers
    Patent number: 4931191
    Abstract: A method for clarifying water by liquid/solid separation comprising dosing the water to be clarified with a copolymer produced by the emulsion polymerization of only hydrophobic monomers where at least one hydrophobic monomer is an amine containing monomer which is hydrophobic when the amine is neutral and hydrophilic when the amine is salified.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: June 5, 1990
    Assignee: Nalco Chemical Company
    Inventors: Michael L. Braden, Stephen J. Allenson
  • Stabilization of aqueous alkali metal aluminate solutions
    Patent number: 4734274
    Abstract: A method of stabilizing an aqueous solution of alkali metal aluminate comprises admixing an aqueous solution of alkali metal aluminate having a pH of at least 10 with a sufficient amount of carboxylate-containing vinyl polymer to form a solution containing fron 0.1 to 2.0 weight percent of an anionic vinyl polymer based on alkali metal aluminate solids, and a stabilized aqueous alkali metal aluminate solution.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: March 29, 1988
    Assignee: Nalco Chemical Company
    Inventor: Stephen J. Allenson