Patents Assigned to Hollingsworth & Vose Air Filtration Limited
  • Filter materials and methods for the production thereof
    Patent number: 6811594
    Abstract: There is disclosed an electrostatically charged filter material comprising a blend of polyester fibers and electrostatically chargeable fibers of at least one other kind.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 2, 2004
    Assignee: Hollingsworth & Vose Air Filtration Limited
    Inventors: Jeremy Andrew Collingwood, John Gordon
  • Filter materials and methods for the production thereof
    Patent number: 6623548
    Abstract: An electrostatically charged filter material including a blend of polypropylene fibres and one selected from the group consisting of: halogen free acrylic fibres; polyvinyl chloride fibers or a mixture of halogen free acrylic fibres and polyvinyl chloride fibres.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: September 23, 2003
    Assignee: Hollingsworth & Vose Air Filtration Limited
    Inventors: John Gordon, Jeremy Andrew Collingwood, Martyn Peter Kennaugh