Production of carbon fibers by the direct carbonization of polybenzimidazole fiber
UST100303I4 · kind I4 · defensive publication
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10Claims
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Inventor
Key dates
| Filing date | Jan 4, 1980 |
| Grant date | Feb 3, 1981 |
| Priority date | — |
| Expiry date | Jan 4, 2000 |
Classification
- Technology area (CPC —)General
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.