Patents Assigned to Knowlton Specialty Papers, Inc.
  • Friction paper containing activated carbon
    Patent number: 5989390
    Abstract: A fibrous friction material in a sheet form having a top surface and a bottom surface with at least one surface containing a mixture of from about 10 to 65% cellulose fibers, about 5 to 50% carbon fibers, about 5 to 50% activated carbon, about 1 to 20% novoloid fibers, up to 65% diatomatious earth particles, and latex in an amount sufficient to increase the strength of the said sheet, with said percentages being based on the total weight of said sheet. The material is impregnated with a thermosetting resin prior to use.
    Type: Grant
    Filed: January 6, 1999
    Date of Patent: November 23, 1999
    Assignee: Knowlton Specialty Papers, Inc.
    Inventor: James M. Lee