Appeal 2007-2359
Application 90/006,951
7. The Examiner has rejected claim 14 under 35 U.S.C. § 103(a) over the
combined teachings of Reiso, Timsit, EP/WO, and Marchive. (Answer
at 11.)
359 Patent Disclosure
8. According to the 359 patent, the invention relates to AlMgSi alloys
containing a relatively low amount of Mg that meet certain strength
requirements and that can be extruded at "the highest possible rates."
(359 patent at 1:5–14.)
9. The principal additional components of the aluminum alloy are said to
be magnesium, silicon, manganese ("Mn"), copper ("Cu"), and iron ("Fe").
(359 patent at 2:1–10.)
10. The Specification adopts a convention that all amounts are reported in
weight-percent (e.g., 359 patent at 1:66-67); accordingly we shall write
"0.34 wt.%" as "0.34 %" or as "0.34" except when quoting the record.
11. The Specification teaches that "incidental impurities" may be present
at up to 0.05 % each, with a total of 0.15 %. (359 patent at 2: 11–13.]
12. Each component is said to have upper and lower limits, beyond which
adverse consequences for the alloy arise.
13. Extrusion pressure is said to increase with increasing Mg content,
eventually becoming unacceptably high. If the Mg content is too low,
"extrusions" (i.e., extruded products) cannot attain the required strength.
The Mg content of the invention alloys is 0.20–0.34, preferably 0.20-0.30.
(359 patent at 2:59–63.)
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