http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1049626-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_10ed6da739ce747c5acbf10148f3f851 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H01K1-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H01K1-04 |
| filingDate | 1965-07-13^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-11-30^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1049626-A |
| titleOfInvention | Improvements in or relating to electric incandescent lamps |
| abstract | 1,049,626. Incandescent lamp filaments. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. July 13, 1965 [July 16, 1964], No. 29657/65. Heading H1F. A selectively radiating filament in an electric lamp consists of, or has a surface consisting of, a compound in which the concentration of free charge carriers lies between 2 x 10<SP>21</SP> and 2 x 10<SP>22</SP> atoms/cc. and the mobility of the carriers at the operating temperature is at least 2 cm<SP>2</SP>/VS. The filament may comprise a hexaboride of a rare earth or alkaline earth metal, for example lanthanum, cerium, praeseodymium, neodymium and ytterbium. Mixtures of these compounds may be used. The bulb filling may contain a volatile borohalogen compound, e.g. BF 3 , BCl 3 . |
| priorityDate | 1964-07-16^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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