Patents by Inventor Martha A. Phelps

Martha A. Phelps 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).

  • Hydrophilic-hydrophobic derivatives of polygalactomannans containing tertiary amine functionality
    Patent number: 5256651
    Abstract: Triple derivatives of polygalactomannan i.e., dialkylaminoalkyl ether-hydroxyalkyl ether - long aliphatic chain ether of polygalactomannan, are useful as thickening agents for aqueous fluids.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: October 26, 1993
    Assignee: Rhone-Poulenc, Inc.
    Inventors: Martha A. Phelps, Michael E. Morgan
  • Polymers made from quaternary ammonium acrylic monomers
    Patent number: 4973637
    Abstract: Quaternary ammonium containing monomers, represented by the formula: ##STR1## wherein R.sub.1 is H or methyl, R.sub.2 is an alkyl group containing 6 to 22 carbon atoms, D is an alkylene group containing 1 to 4 carbon atoms, or a hydroxylalkylene group containing 2 to 4 carbon atoms and X is an anion, are polymerized to form polymers useful in hair care preparations.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: November 27, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: Michael E. Morgan, Martha A. Phelps
  • Method for reducing the viscosity of aqueous fluid
    Patent number: 4941537
    Abstract: The viscosity of aqueous fluids thickened with a tertiary amino polygalactomannan is reduced by the addition of an alkali metal or alkaline earth metal salt of hypochlorous acid, or a chlorinated isocyanurate.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: July 17, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: Paul W. Langemeier, Martha A. Phelps, Michael E. Morgan
  • Tertiaryaminoalkyl-hydroxyalkyl ethers of polygalactomannans
    Patent number: 4918181
    Abstract: Dialkylaminoalkyl-hydroxyalkyl ethers of polygalactomannan are useful as thickening agents for aqueous fluids.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: April 17, 1990
    Inventors: Dennis J. Karcher, Michael E. Morgan, Martha A. Phelps
  • Quaternary ammonium acrylic monomers and alcohol soluble polymers made therefrom
    Patent number: 4918228
    Abstract: Quaternary ammonium containing monomers, represented by the formula: ##STR1## wherein R.sub.1 is H or methyl, R.sub.2 is an alkyl group containing 6 to 22 carbon atoms, D is an alkylene group containing 1 to 4 carbon atoms, or a hydroxyalkylene group containing 2 to 4 carbon atoms and X is an anion, are polymerized to form polymers useful in hair care preparations.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: April 17, 1990
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: Michael E. Morgan, Martha A. Phelps
  • Reduction of viscosity of aqueous fluids
    Patent number: 4647385
    Abstract: The viscosity of thickened aqueous solutions of water-soluble polymers is reduced by the addition of alkali metal and alkaline earth metal salts of hypochlorous acid and tertiary amines. The combination of the salt and the tertiary amine is much more efficient in speed of reduction in viscosity and in the completeness of the degradation of the polymer than the use of the metal salt alone. The process of this invention is particularly useful in fracturing of oil wells.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: March 3, 1987
    Assignee: Hi-Tek Polymers, Inc.
    Inventors: Martin M. Williams, Martha A. Phelps, George M. Zody