Appeal No. 2004-2027
Application No. 09/670,189
source of the modifying element, the fluoride of
the modifying element being selected from the
group consisting of a zirconium fluoride and a
hafnium fluoride, and combinations thereof, and
a carrier gas;
producing a coating gas from the coating source,
the coating gas comprising a gaseous aluminum halide, a
gaseous fluoride of the modifying element, and the
carrier gas; and
contacting the coating gas to the surface of the
airfoil; and simultaneously
heating the coating gas and the article to a
coating temperature of from about 1850ºF to about
2000ºF for a period of time sufficient to permit
aluminum and the modifying element to coat onto the
surface of the airfoil.
The examiner relies on the following prior art references as
evidence of unpatentability:
Chang et al. 3,951,642 Apr. 20, 1976
(Chang)
Speirs et al. 4,066,806 Jan. 03, 1978
(Speirs)
Bornstein et al. 4,142,023 Feb. 27, 1979
(Bornstein)
Smith et al. 4,180,400 Dec. 25, 1979
(Smith)
Basta et al. 5,261,963 Nov. 16, 1993
(Basta ’963)
Basta et al. 5,658,614 Aug. 19, 1997
(Basta ’614)
Warnes et al. 5,989,733 Nov. 23, 1999
(Warnes) (filed Jul. 23, 1996)
The appealed claims stand rejected under 35 U.S.C. § 103(a)
as follows:
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