http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2657078-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_408fdb6be42189895a2f1dfb75f300d2 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S501-901 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S501-903 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-142 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-074 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-072 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-072 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-15 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-074 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C4-00 |
| filingDate | 1991-01-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_027c3467cd35c6851b8572624a89de85 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a037efce4f35989962e1c6b289bfc74f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8ac41ea516d64c33ac4aed310c59b1c3 |
| publicationDate | 1991-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2657078-A1 |
| titleOfInvention | OPTICAL GLASS HAVING NEGATIVE PARTIAL DISPERSION IN THE BLUE REGION, ND REFRESHING INDEX VALUE OF 1.69 TO 1.83 AND A NUMBER OF ABBE VD VALANT FROM 29 TO 38.5. |
| abstract | The invention relates to a chemically stable glass which can be prepared at relatively low melting temperatures, exhibiting an anomalous negative partial dispersion Pg, F, a refractive index nD of 1.69 to 1.83 and a Abbe vD number ranging from 29 to 38.5. This glass contains, in weight percentages of oxides: 0 - 7.5 SiO2 + GeO2 25 - 33 B2 O3 19 - 50 PbO 0 - 2 HfO2 1 - 6 ZrO2 1 - 6 ZrO2 + HfO2 4 - 20 Ta2 O5 0 - 8 , 0 Al2 O3 0 - 4 TiO2 0 - 1 WO3 0 - 7 Nb2 O5 0 - 2 GeO2 0 - 4.5 Li2 O 0 - 4.5 Na2 O 0 - 4.5 K2 O 0 - 4.5 total oxides alkalis 0 - 10 MgO 0 - 16 CaO 0 - 16 BaO 0 - 16 SrO 0 - 16 BaO + SrO 0 - 16 ZnO 0 - 20 total alkaline earth oxides + ZnO 0 - 2 O3 0 - 5.5 Y2 O3 0 - 5.5 Gd2 O3 0 - 11 total La2 O3 + Y2 O3 + Gd2 O3 with the condition that the ratio (SiO2 + GeO2 + B2 O3) / (Ta2 O5 + ZrO2 + HfO2) is less than or equal to 5 and that the PbO / (SiO2 + GeO2 + B2 O3) ratio is less than 2, as well as optionally the usual refining adjuvants. |
| priorityDate | 1990-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 51.