http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1090580-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_e9e11ac16e9c5716e1f3e12ecaeb06ff |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-315 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C3-097 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-097 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C21-00 |
| filingDate | 1977-02-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1980-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3d076ba241337f25f24e66ee213e279 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4595b4e1eed9e326bba3fb37e6878450 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_68c81ada0d4b75f85beb1cf15c847428 |
| publicationDate | 1980-12-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1090580-A |
| titleOfInvention | High strength ophthalmic lens |
| abstract | HIGH STRENGTH OPHTHALMIC LENS Abstract of the Disclosure An ophthalmic glass lens having a compressively-stressed surface zone after ion exchanging which is at least 120 microns in depth, formed from an alkali metal oxide silicate glass comprising by weight about 4 to about 15 percent sodium oxide and about 3 to about 15 percent potassium oxide. There is a compressively-stressed surface layer having a strength of at least 25,000 psi. The total amount of sodium, potassium and other alkali metal oxides is up to about 20 percent. The total amount of zinc oxide, lanthanum oxide, magnesium oxide, and calcium oxide is about 8 to 15 percent, and these is about 3 to about 15 percent phosphorus pentoxide. An ion exchange process takes place at a temperature either above or below the strain point of conventional ophthalmic crown glass to produce satisfactory physical properties in the ophthalmic glass lens. |
| priorityDate | 1976-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.