Pitch for carbon fibers
US4490239A · kind A · utility
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5References
5Claims
0Family size
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Key dates
| Filing date | Mar 22, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Mar 22, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F9/145
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A pitch which affords a carbon fiber having a high strength and a high elastic modulus is obtained by treating a pitch containing 5 to 35 weight percent of an optically anisotropic region with sulfur.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.