Appeal No. 2004-1131
Application 09/562,632
X
|
W―(CH2)n―Si―Y (|)
|
Z
wherein
W denotes the group
O
O
or O m(H2C) CH CH2
with m = 1 to 4 and
n denotes a whole number from 2 – 4
and
X, Y, Z represent, independently of one another, the same or different organic groups
with 1 to 30 atoms, with the proviso that at least one of the groups represents an alkoxy
group with 1 to 4 carbon atoms,
wherein the molar ratio of the hydroxyl groups of component a) to the isocyanate groups
of component b) is between 0.2 : 1 and 3 : 1, and the same of the wt.% of components
a) to c) is 100.
The appealed claims, as represented by claim 1, are drawn to a coating composition
comprising at least the three components in the amounts specified in the claim. According to
appellants, the claimed composition can form an aqueous two-component polyurethane coating
composition with “improved adhesion and corrosion resistance, preferably on metal substrates,
such as aluminum and steel and car body sheet” (specification, e.g., page 1).
The references relied on by the examiner are:
Kubitza et al (Kubitza) 5,075,370 Dec. 24, 1991
Tsuno et al. (Tsuno) 5,109,057 Apr. 28, 1992
Hatano et al. (Hatano) 5,527,616 Jun. 18, 1996
The examiner has rejected appealed claims 1 through 7 under 35 U.S.C. § 103(a) as being
unpatentable over Kubitza in view of Tsuno and Hatano.
Appellants state that the appealed claims “stand or fall together” (brief, page 3). Thus,
we decide this appeal based on appealed claim 1. 37 CFR § 1.192(c)(7) (2002).
We affirm.
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