Appeal No. 1999-0663
Application 08/624,047
1127, 1129 n.2 (Fed. Cir. 1995); 37 CFR § 1.192(c)(7)(1997).
Scott discloses a catalyst composition which consists
essentially of a mixture of copper chloride, magnesium chloride
and potassium chloride, on a support (abstract). The preferred
support is particulate alumina (page 3, lines 25-28). Like the
appellants’ catalyst (specification, page 2, lines 31-32),
Scott’s catalyst is useful for oxychlorination of ethylene to
1,2-dichloroethane (abstract). A comparison of Scott’s preferred
amounts of copper, magnesium and potassium, per kilo of catalytic
composition (page 2, lines 47-49), versus those in the
appellants’ claim 11, is as follows:
Scott Appellants
Cu 30-90 30-90
Mg 2-30 10-30
K 2-30 0.1-10
A comparison of Scott’s preferred K/Cu, K/Mg and Mg/Cu atomic
ratios (page 2, lines 50-51) versus those in the appellants’
claim 11 is as follows:
Scott Appellants
K/Cu 0.1-1 0.025-0.25
K/Mg 0.1-10 0.01-0.8
Mg/Cu 0.1-1 0.5-1.5
The overlap between the catalysts of the appellants and Scott as
to each metal and atomic ratio would have rendered the
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