Patents Assigned to Wolstenholme International Limited
  • Fire barrier materials
    Patent number: 6616866
    Abstract: A fire barrier material comprising a combination of materials capable of melting progressively as the temperature rises under fire conditions, namely a relatively high melting devitrifying frit, one or more substances to reduce melt and flow temperature of the frit and, optionally, an intumescent substance and/or a pH buffer. The material is particularly suitable for use in thermoplastic materials.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: September 9, 2003
    Assignee: Wolstenholme International Limited
    Inventor: Geoffrey Crompton