Composite tooling

Fuel and related compositions – Coal treating process or product thereof

Reexamination Certificate

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C044S607000, C264S029600, C264S029700, C423S44500R, C423S448000, C423S460000, C428S543000

Reexamination Certificate

active

06849098

ABSTRACT:
Carbonaceous, composite tooling fabricated from pitch-based or coal-based cellular or porous products, “carbonaceous foams” having a density of preferably between about 0.1 g/cm3and about 0.8 g/cm3that are produced by: 1) conventional pitch foaming processes or; 2) the controlled beating of coal particulate preferably up to ¼ inch in diameter in a “mold” and under a non-oxidizing atmosphere. According to a specifically preferred embodiment, the starting material coal has a free swell index as determined by ASTM test D720 of between about 3.5 and about 5.0.

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