Appeal No. 2003-1246
Application 08/393,617
As Appellants' brief (at 2, para. (7)) states that the
rejected claims will stand or fall together and argues the merits
of only claim 1, we will treat claims 2-3 as standing or falling
with claim 1.
D. The merits of the rejection
Snell's solder glass comprises by weight about 65% Sb2O3,
30% B2O3, and 5% PbO (lead oxide)(col. 2, ll. 34-36). In
contrast to prior art lead borate solder glasses, which have a
lead content above 70% and thus attack molybdenum (col. 1., ll.
41-45), the amount of lead in Snell's solder glass is said to be
too small to adversely affect the molybdenum seal (col. 2, ll.
38-39) which is formed by molybdenum foil portion 16 (id. at ll.
24-25). The weight percentages of Sb2O3 and B2O3 in Snell's
solder glass fall within the ranges set for these components in
Appellants' claim 1. However, Snell does not indicate that the
solder glass can contain any ZnO, as required by claim 1. For
this teaching, the examiner cites Weaver.
Weaver's glass compositions, which can be used either as
sealing (i.e., solder) glasses or as resistive, arc-preventive
coatings on the interior surfaces of cathode ray tubes (col. 2,
ll. 24-28), include binary and ternary systems comprising 45-80%
of V205 (vanadium oxide), 5-50% of P2O5 (phosphorous oxide), and
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