Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Producing or treating inorganic material – not as pigments,...
Reexamination Certificate
2005-04-12
2005-04-12
Staicovici, Stefan (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Producing or treating inorganic material, not as pigments,...
C264S029200, C264S029500, C264S029700, C264S102000, C264S258000, C264S450000, C264S451000, C264S511000, C264S512000
Reexamination Certificate
active
06878331
ABSTRACT:
A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, a suitable matrix material, such as a milled pitch is compressed while resistively heating the mixture to form a carbonized composite material. Preferably, the carbonized material has a density of at least about 1.30 g/cm3. Preferably, the composite material is formed in less than ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. A treating component may be impregnated into the composite. Consequently, carbon composite materials having final densities of about 1.6-1.8 g/cm3or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.
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SGL Carbon Company, Sigrasic Brochure, SGL Technik GmbH, (May 1999) Meitingen, Germany.
Huang Dai
Lewis Irwin C.
Lewis Richard T.
Snyder David
Cartiolia James R.
Staicovici Stefan
UCAR Carbon Company Inc.
Waddey & Patterson , P.C.
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