Patents by Inventor Patrick Albert Clark

Patrick Albert Clark 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).

  • Digitally encoded polymers
    Patent number: 6812309
    Abstract: A method for encoding a polymer. The method comprises incorporating, into a polymer formed by polymerizing at least one bulk monomer, from 0.1 ppm to 1% each of at least two additional monomer residues.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: November 2, 2004
    Assignee: Rohm and Haas Company
    Inventor: Patrick Albert Clark
  • Redox system and process
    Patent number: 6713557
    Abstract: A process for preparing an aqueous emulsion polymer including providing at least one ethylenically unsaturated monomer and a free radical redox initiator system under emulsion polymerization conditions, the redox initiator system including an oxidant; a reductant and a metal promoter complex, and effecting the polymerization of at least some of the ethylenically unsaturated monomer is provided. Also provided is a process for reducing the residual ethylenically unsaturated monomer content of an aqueous emulsion polymer.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: March 30, 2004
    Assignee: Rohm and Haas Company
    Inventors: Steven Michael Baxter, Patrick Albert Clark
  • Digitally encoded polymers
    Publication number: 20030130463
    Abstract: A method for encoding a polymer. The method comprises incorporating, into a polymer formed by polymerizing at least one bulk monomer, from 0.1 ppm to 1% each of at least two additional monomer residues.
    Type: Application
    Filed: December 16, 2002
    Publication date: July 10, 2003
    Inventor: Patrick Albert Clark
  • Method for predicting outdoor durability of coatings
    Publication number: 20020148288
    Abstract: A method for predicting the outdoor durability of a first coating relative to the outdoor durability of at least one other of a set of coatings, all of the coatings having been formed from aqueous coating compositions comprising a thermoplastic emulsion polymer, particularly a predominantly acrylic thermoplastic emulsion polymer, and, optionally, a pigment, comprising exposing the set of coatings to the same ambient outdoor conditions for the same period of time, subjecting the exposed coatings to a chemiluminescence test, and comparing the result of said chemiluminescence test performed on the first coating to the corresponding result for at least one other of the set of coatings.
    Type: Application
    Filed: January 10, 2002
    Publication date: October 17, 2002
    Inventors: Patrick Albert Clark, Kristin Weidemaier
  • Redox system and process
    Publication number: 20020099156
    Abstract: A process for preparing an aqueous emulsion polymer including providing at least one ethylenically unsaturated monomer and a free radical redox initiator system under emulsion polymerization conditions, the redox initiator system including an oxidant; a reductant and a metal promoter complex, and effecting the polymerization of at least some of the ethylenically unsaturated monomer is provided. Also provided is a process for reducing the residual ethylenically unsaturated monomer content of an aqueous emulsion polymer.
    Type: Application
    Filed: November 20, 2001
    Publication date: July 25, 2002
    Inventors: Steven Michael Baxter, Patrick Albert Clark