Patents by Inventor Shona M. Page

Shona M. Page 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).

  • Smoke suppressant additive for halogenated polymer composition
    Patent number: 5006174
    Abstract: A smoke suppressant additive for halogenated polymer compositions which consists of a mixture of from 30 to 70% by weight of zinc oxide and from 70 to 30% by weight of caustic calcined magnesium oxide with the addition thereto of up to 20% by weight of finely divided silica based upon the total weight of the zinc oxide and magnesium oxide, the mixture having being subjected to calcination at a temperature in the range of from 700.degree. to 1100.degree. C. for a period of time of from 1 to 6 hours.The additive is incorporated into halogenated polymers in an amount of from 0.5 to 10% by weight, preferably about 2.5% by weight.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: April 9, 1991
    Assignee: Cookson Group PLC
    Inventors: Ernest W. J. Michell, Shona M. Page