Patents Assigned to Hollingsorth & Vose Company
  • Vapor deposition treated electret filter media
    Patent number: 6802315
    Abstract: A vapor phase treated electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides and mixtures thereof. Exemplary vapor phase deposition monomers include fluorinated monomers.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: October 12, 2004
    Assignee: Hollingsorth & Vose Company
    Inventors: Richard E. Gahan, Wai Ming Choi