Patents by Inventor Dominic Chaplin

Dominic Chaplin 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).

  • Flame retardant polymer formulation
    Patent number: 5342874
    Abstract: The invention describes a formulation for halogenated polymers without added antimony trioxide. The halogenated polymers contain a synergistic mix of flame retardants comprising 10-400 phv of an aluminum or magnesium hydroxide and 0.5-80 phv of trioxide or a metal stannate or hydroxystannate.
    Type: Grant
    Filed: April 29, 1993
    Date of Patent: August 30, 1994
    Assignee: Alcan International Limited
    Inventors: Dominic Chaplin, Rosemary Tingley
  • Fire-retardant compositions
    Patent number: 5338791
    Abstract: This invention relates to fire-retardant polymer compositions, and preferably, but not exclusively, to fire-retardant polyamide compositions.It has now been found that the combination of a zinc borate and a divalent metal stannate, particularly zinc stannate, in halogen-containing polymeric compositions provides an increased fire-retardant effect, which is greater than that expected from the use of either zinc borate or the stannate alone. The combination also suppresses smoke production. Preferably the stannate is zinc stannate.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: August 16, 1994
    Assignee: Alcan International Limited
    Inventor: Dominic Chaplin
  • Liquid crystalline mixture
    Patent number: 5190688
    Abstract: This invention relates to liquid crystalline mixtures with at least two liquid-crystalline compounds which are free of perfluoro alkylene groups and at least one partially fluorinated additive of formula IR.sup.1 --(CH.sub.2).sub.m --(CF.sub.2).sub.n --R.sup.2 Iwherein R.sup.1, R.sup.2, m and n have the meanings indicated in patent claim 1, and to a means of reducing the refractive indices of a liquid crystalline mixture by adding one or more partially fluorinated additives of formula I.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: March 2, 1993
    Assignee: Merck Patent Gesellschaft mit beschrankter Haftung
    Inventors: Ian C. Sage, Stephen J. Lewis, Dominic Chaplin