Appeal No. 2002-1752
Application 09/180,464
BACKGROUND
The invention relates to a method of producing alloys
from eutectic alloy systems in order to form workpieces for
forging, cold flow pressing, rolling or extrusion purposes.
Specification, page 1, first paragraph. A known method for
producing an aluminum alloy is disclosed in Reiso.1 Reiso’s
method includes the steps of casting an ingot or billet,
homogenizing and then cooling the billet, reheating the billet
to a temperature above the solubility temperature of the
precipitated phases in the aluminum matrix, and then holding
the billet at this temperature until the phases are dissolved.
Reiso, claim 1. These method steps are also used in the method
of the invention. See claim 27; Appeal Brief, page 5, second
paragraph.
The final step in Reiso’s claimed method requires quick
cooling the billet to a desired extrusion temperature such that
new precipitation of phases in the alloy structure is prevented.
See Reiso, claim 1. According to appellants, a disadvantage of
1 Oddvin Reiso, the named inventor, is also one of the named
inventors of the present invention. See Appeal Brief, Paper
No. 18, received December 17, 2001, page 5, second paragraph.
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