http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4882139-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7073bac5657e4b152760cce91c32920f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F9-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/D01F9-15 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C10C3-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/D01F9-14 |
| filingDate | 1988-11-30^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-11-21^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a593312f11202bae4aee70306da0a610 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c2d0d78ed63862ae05a7e879d0cb084a |
| publicationDate | 1989-11-21^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4882139-A |
| titleOfInvention | Improved production of carbon fibers |
| abstract | In a process for the production of carbon fibers from high boiling bituminous substances in which a purified and polymerized concentrated carbon fiber precursor is spun into fibers which are oxidized and then carbonized and optionally graphitized, the improvement comprising just before spinning a supercritical gas is dissolved in mesophase pitch at a pressure of 100 to 350 bars and a temperature up to 150 DEG K. below the melting temperature of the mesophase pitch to form a low viscosity melt, separating the latter into an isotropic phase and an anisotropic carbon fiber precursor and spinning the latter into fibers whereby the spinning temperature is lowered and the mesophase contact is increased due to the viscosity lowering activity of the supercritical gas. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5792577-A |
| priorityDate | 1987-12-08^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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