Appeal 2006-3159
Application 10/233,318
We AFFIRM.
INTRODUCTION
Appellants claim a friction material comprising, in relevant part, a
fibrous base material and second layer wherein the second layer has a lower
permeability in the radial direction and a lower permeability in the normal
direction than the first base layer (claim 1; Specification 19:2-10).
Claim 1 is illustrative:
1. A friction material comprising a first layer comprising a
fibrous base material, and a second layer comprising at least one type
of friction modifying particle on a top surface of the fibrous base
material, the second layer having an average thickness of about 30-
200 μm, wherein the second layer has a permeability lower than the
first layer,
wherein the friction modifying particles have an average
diameter size from about 0.1 to about 80 microns,
wherein the fibrous base material has an average voids
volume from about 50% to about 85%, and
wherein the second layer has a lower permeability in the
radial direction and a lower permeability in the normal direction than
the first layer.
The Examiner relies on the following prior art references as evidence
of unpatentability:
Lam I US 5,856,244 Jan. 5, 1999
Seitz US 6,524,681 B1 Feb. 25, 2003
Lam II1 US 6,630,416 B1 Oct. 7, 2003
1 Roman numerals have been added to differentiate between Lam US
5,856,244 (i.e., Lam I) and Lam US 6,630,416 B1 (i.e., Lam II).
2
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