Patents Represented by Attorney David J. Roper

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  • Carbodiimide and metal containing emulsion or dispersion coating composition
    Patent number: 4966948
    Abstract: A coating composition containing a carboxyl functional polymeric emulsion or dispersion, a carbodiimide and a transition metal catalyst which upon curing provides coatings with improved resistance properties.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: October 30, 1990
    Assignee: Akzo Coatings, Inc.
    Inventors: E. Floyd Godbey, Jr., Norman G. Wolfe, David J. Zepka
  • Process for removing permanganate stains from articles
    Patent number: 4961749
    Abstract: A process for bleaching articles, such as fabrics, comprising the steps of treating an article with a permanganate bleaching agent and then reducing the permanganate with a reducing composition comprised of ammonium bisulfite and ammonium sulfite.
    Type: Grant
    Filed: August 1, 1989
    Date of Patent: October 9, 1990
    Assignee: P.B. & S. Chemical Company, Inc.
    Inventor: James L. Clements
  • Process for preparing conductive plastic articles
    Patent number: 4851081
    Abstract: Conductive plastic articles are prepared by forming plastic pellets, etching the pellets in an etching bath, treating the pellets with a palladium-tin catalyst solution and an acidic accelerator, coating the pellets with metal, and heating the coated pellets.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: July 25, 1989
    Assignee: Celanese Engineering Resins
    Inventor: Alex Forschirm
  • Metal acetylacetonate/alkylphenol curing catalyst for polycyanate esters of polyhydric phenols
    Patent number: 4847233
    Abstract: Polycyanate esters of polyhydric phenols are cured with a liquid solution of a metal acetylacetonate in an alkylphenol. Such cured compositions are useful in structural composites, transfer molded-encapsulants, filmed structural adhesives and printed wiring boards.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: July 11, 1989
    Assignee: Hi-Tek Polymers, Inc.
    Inventor: David A. Shimp
  • Combination tub and pail opener
    Patent number: D303344
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: September 12, 1989
    Assignee: Indco Incorporated
    Inventor: Charles E. Broadus