The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 23, 1999
Filed:
Jan. 06, 1999
Applicant:
Inventor:
James M Lee, Watertown, NY (US);
Assignee:
Knowlton Specialty Papers, Inc., Watertown, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21F / ; F16D / ;
U.S. Cl.
CPC ...
162141 ; 162146 ; 162152 ; 1621571 ; 1882 / ; 1921 / ; 4283179 ; 4283191 ; 428323 ; 428402 ; 428408 ; 428920 ; 428367 ;
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.