Research/Patents/US 5298313
US 5298313

ABLATIVE AND INSULATIVE STRUCTURES AND MICROCELLULAR CARBON FIBERS FORMING SAME

Assignee

KETEMA INC.

Filed

Jan 31, 1990

Granted

Mar 29, 1994

Location

GLENBROOK NV US

Abstract

Microcellular carbon filaments having a specific gravity no greater than about 1.4 are formed from PAN foamed filaments by carbonizing. These low density carbon filaments, which may also be hollow, have improved insulation properties compared with conventional PAN precursor carbon fibers and can be used as a replacement to rayon precursor carbon fibers where greater insulation is necessary.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Mar 11, 1991

Rescinded

Jul 13, 1993

Duration

2 years, 4 months

Inventor

  • 1ROBERT L. NOLAND

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records