Fluid reaction surfaces (i.e. – impellers) – With heating – cooling or thermal insulation means – Changing state mass within or fluid flow through working...
Reexamination Certificate
2006-12-05
2006-12-05
Edgar, Richard A. (Department: 3745)
Fluid reaction surfaces (i.e., impellers)
With heating, cooling or thermal insulation means
Changing state mass within or fluid flow through working...
C416S23100A, C029S889700, C415S173100, C164S122100
Reexamination Certificate
active
07144220
ABSTRACT:
An article may be manufactured by providing a reticulate core element in a mold shell having a shape at least partially corresponding to a shape of the article. The molten metallic material is introduced to the shell so as to at least partially infiltrate into the reticulate core element. The molten metallic material is permitted to solidify. The shell and the reticulate core element are destructively removed. The removal leaves the article with one or more gas-permeable porous regions.
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ERG Materials and Aerospace Corporation, DUOCEL Ceramic Foam, Oakland, California.
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Edgar Richard A.
United Technologies Corporation
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