Patents by Inventor Leslie E. Wallace

Leslie E. Wallace 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).

  • Color improvement of polymer compounds and products molded therefrom
    Patent number: 4602072
    Abstract: The specification discloses a method for improving color purity in polymers by passing the monomer stream first through an alkali metal aluminosilicate molecular sieve and then through an activated alumina bed prior to polymerization.
    Type: Grant
    Filed: December 3, 1984
    Date of Patent: July 22, 1986
    Assignee: The Dow Chemical Company
    Inventors: Leslie E. Wallace, Leo F. Rokosz, Charles L. Stacy, Jr.
  • Highly impact resistant carbonate polymer blends
    Patent number: 4544706
    Abstract: Carbonate polymer compositions comprise extruded blends of a carbonate polymer and a copolymer consisting essentially of a monovinylidene aromatic comonomer and an .alpha.,.beta.-ethylenically unsaturated comonomer having a polar group. Optionally, a small amount of monovinylidene copolymer can be blended with said composition. Such compositions exhibit high impact strengths, improve the melt processability of the carbonate polymer and are advantageously highly transparent and exhibit low haze.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: October 1, 1985
    Assignee: The Dow Chemical Company
    Inventors: Charles R. Finch, Leslie E. Wallace, Thomas E. Evans
  • Addition of additives to plastics
    Patent number: 4511603
    Abstract: Additives are sprayed onto synthetic resinous thermoplastic particles by applying a spray nozzle at an elbow spraying radially outwardly.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: April 16, 1985
    Assignee: The Dow Chemical Company
    Inventor: Leslie E. Wallace