Metal treatment – Stock – Aluminum base
Reexamination Certificate
2011-01-18
2011-01-18
Ward, Jessica L (Department: 1793)
Metal treatment
Stock
Aluminum base
C148S690000, C148S693000, C420S542000, C420S543000
Reexamination Certificate
active
07871477
ABSTRACT:
High temperature heat treatable aluminum alloys that can be used at temperatures from about −420° F. (−251° C.) up to about 650° F. (343° C.) are described. The alloys are strengthened by dispersion of particles based on the L12intermetallic compound Al3X. These alloys comprise aluminum, magnesium, lithium, at least one of scandium, erbium, thulium, ytterbium, and lutetium, and at least one of gadolinium, yttrium, zirconium, titanium, hafnium, and niobium.
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Kinney & Lange , P.A.
Polyansky Alexander
United Technologies Corporation
Ward Jessica L
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