Appeal No. 2005-0582
Application 09/870,014
helium, the argon and the helium with a content greater
than or equal to 70% by volume; and
a third gas consisting of O2 or CO2 with a content of
non zero to 30% by volume.
The examiner relies upon the following references as
evidence of obviousness:
Yenni et al. (Yenni) 2,753,427 July 3, 1956
Cook 2,790,656 Apr. 30, 1957
Steen 4,167,662 Sep. 11, 1979
Hamasaki 4,507,540 Mar. 26, 1985
Galantino et al. (Galantino ‘841) 4,749,841 June 7, 1988
Cherne et al. (Cherne) 4,871,898 Oct. 3, 1989
Galantino et al. (Galantino ‘866) 4,902,866 Feb. 20, 1990
Beyer et al. (Beyer) 5,821,493 Oct. 13, 1998
Appellants’ claimed invention is directed to a process for
arc/laser hybrid welding for joining together workpieces made of
steel. The process shields at least one part of the welding zone
with a ternary gas mixture consisting of argon, helium and an
amount of O2 or CO2 within the range of greater than zero to 30%
by volume.
The appealed claims stand rejected under 35 U.S.C. § 103(a)
as follows:
(a) claims 1, 2, 7-9, 15, 22, 23 and 25 over Hamasaki in
view of Steen, Yenni, Cherne or Galantino ‘841;
2
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