http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0452640-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a8a9982b1666c54b5bf02d6c944891e4 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C03C4-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C4-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C21-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-74 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-725 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C03C3-11 |
| filingDate | 1991-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e42d4e7449f9b1e034e6cfd84e4f81a5 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1015d3e077fbae9159c18a3047ccc54a |
| publicationDate | 1991-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0452640-A1 |
| titleOfInvention | Method of coloring photochromic glasses |
| abstract | This invention is directed to a method for making tinted photochromic glass articles having an integral reduced surface layer exhibiting color, the glass utilizing silver halide crystals as the photochromic agent. The method generally comprises heat treating the glass article in a heating chamber in an atmosphere of flowing hydrogen at temperatures below 500°C. The specific steps of the inventive method comprise:n (a) initially flowing hydrogen gas into said heat treating chamber at a sufficiently rapid rate to essentially instantaneously fill said chamber with the gas; (b) immediately thereafter decreasing the flow of said the hydrogen gas to permit careful control of the rate at which reduction takes place in the glass surface; and (c) continuing that gas flow for a sufficient length of time to produce an integral reduced surface layer on both front and back surfaces of the article having a combined depth effective to exhibit a color, but not of such individual depth as to prevent the passage of ultraviolet radiation through the front surface of the article. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1119794-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1038500-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1119794-A4 |
| priorityDate | 1990-04-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.