Appeal No. 1998-3276
Application No. 08/667,211
been withdrawn from further consideration pursuant to a
restriction requirement. See 37 CFR § 1.142(b) (1959).
The subject matter on appeal relates to a method for
forming a triniobium tin superconductor in a manufacturing
environment or operation. According to the appellants, the
invention is based on the discovery that the presence of iron in
a manufacturing environment or operation limits the reaction
kinetics and the critical current of triniobium tin. (Appeal
brief, page 2.) Further details of this appealed subject matter
are recited in illustrative claim 1 reproduced below:
1. A method for forming a triniobium tin
superconductor during a manufacturing operation,
comprising the steps of:
passing an internally oxidized niobium-base
substrate through a molten tin alloy dip during a
manufacturing operation while controlling iron content
in the dip to less than or equal to 125 parts per
million by weight iron to coat the substrate with a
sufficient amount of a tin alloy coating; and then
reaction annealing the substrate with the tin alloy
coating at about 900 - 1200°C in an inert atmosphere
for a time sufficient to form the triniobium tin
superconductor.
10, 11, and 12. The examiner indicated in an advisory action
mailed December 8, 1997 (paper 10) that the amendment will be
entered for purposes of this appeal. Notwithstanding the
examiner’s statement in the advisory action, we note that the
amendment has not been clerically entered. We trust that the
amendment will be properly entered on return of this application
to the examiner’s jurisdiction.
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