| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be055db3c1a09879df07379ba969e223 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2077-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29K2079-08 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B29C43-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04R31-003
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-524 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04R31-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B29C43-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-524 |
| filingDate |
1991-07-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e3c036466266eba6a0fd42f510e01185
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13ae7d37495962e74711e06f3e829317 |
| publicationDate |
1992-01-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0468524-A2 |
| titleOfInvention |
Method of manufacturing acoustic diaphragm |
| abstract |
A method of manufacturing a dome- or cone-like acoustic diaphragm by a process comprising the step of heating a polymeric film comprising an aromatic polyimide, a polyoxadiazole or an aromatic polyamide, to a temperature range of 2,000 °C or above, and the step of pressure molding. The heating and the pressure molding may be carried out at the same time when the polymeric film is heated for its graphitization. Alternatively, the pressure molding may be carried out while the polymeric film having been graphitized by the heating is further heated. Still alternatively, a polymeric film having been pressure-molded in the course of heat polycondensation of a polyamic acid may be graphitized by heating. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1265281-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7264869-B2 |
| priorityDate |
1990-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |