Compositions – Gaseous compositions
Reexamination Certificate
2006-01-31
2006-01-31
Langel, Wayne A. (Department: 1754)
Compositions
Gaseous compositions
C219S074000
Reexamination Certificate
active
06991748
ABSTRACT:
In a process for the production of a shielding gas mixture argon is withdrawn from a liquid argon supply, vaporized and mixed with a gas premix. The gas premix contains helium and/or argon and a doping gas. A shielding gas mixture prepared this way is outstandingly suited, especially because of the helium content, for arc welding of aluminum and aluminum alloys.
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Haas Burkhard
Miklos Ernst
Langel Wayne A.
Linde Aktiengesellschaft
Millen, White, Zelano & Braningan, P.C.
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