| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c3070783318d4f17db6ad97e418a5503 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B2205-82
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B2205-96
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B2205-98
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B2205-80 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-01815
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03B37-01876 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03B37-018 |
| filingDate |
1987-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d14111979a4f8dd764896b0e7d2ccb1
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fc1df5d9844756fadeaa53164f643a7b |
| publicationDate |
1989-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-3731345-A1 |
| titleOfInvention |
METHOD FOR PRODUCING A PREFORM FOR A LIGHTWAVE GUIDE |
| abstract |
The invention relates to a process for the production of a preform for a (quartz glass) optical waveguide by the internal-coating process using a graphite furnace which is heated directly by electrical means and is flushed with a blanket gas (protective gas), preferably argon. The axial sealing between the graphite furnace and the support tube is effected by at least one rotating gas seal, i.e. a seal having a tangentially rotating gas stream, by means of which the consumption of blanket gas is considerably reduced, temperature variations caused by axial gas flows are suppressed and adaptation to different preform diameters and/or eccentricities takes place without the need to readjust an iris diaphragm. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100363286-C
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0029342-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4001462-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004050572-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2739374-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7814767-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2361472-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2361472-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6735983-B1 |
| priorityDate |
1987-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |