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:
Feb. 08, 1983
Filed:
May. 29, 1981
Applicant:
Inventor:
Frank J Washabaugh, Titusville, NJ (US);
Assignee:
Engelhard Corporation, Edison, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
523155 ; 523156 ; 524445 ;
Abstract
Heat-treated palygorskite clay, such as attapulgite having controlled low moisture and carbonate content, is used with steel wool or other non-asbestos fiber in asbestos-free friction material compositions such as clutch linings, brake pads, truck blocks and the like. These compositions include conventional fillers, lubricants, wear modifiers and the like in order to achieve friction and wear properties comparable to asbestos-based materials.