http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6087085-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_20688220cab72ad01902ff5223732946 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-16 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-0051 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-005 |
| filingDate | 1998-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2000-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_587a9cfd5c87cc7b7a949b38c875ab8a |
| publicationDate | 2000-07-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6087085-A |
| titleOfInvention | Preparation method of morphologically homogeneous (111) tabular crystals rich in silver bromide |
| abstract | A method is disclosed for preparing an emulsion having grains rich in silver bromide in the presence of gelatin as a protective colloid in a reaction vessel wherein a yield of more than 250 g of precipitated silver nitrate per liter of reaction vessel mixture is attained, wherein at least 70% of a total projected area of all grains is provided by {111} tabular grains having an average aspect ratio of more than 2:1 and an average thickness of from 0.05 up to 0.30 mu m and wherein a ratio by number of percentage amounts of hexagonal tabular grains to triangular tabular crystals present is more than 10:1, said method comprising following steps: preparing in a reaction vessel a gelatinous dispersion medium containing an initial amount of oxidized gelatin corresponding with less than 50% of a total amount of gelatin used in the said method, and said dispersion medium having a volume of less than 2 liter per 500 g of silver nitrate to be precipitated; precipitating therein silver halide crystal nuclei by double-jet precipitation of an aqueous silver nitrate and an aqueous solution comprising halide ions, wherein less than 10% by weight of a total amount of silver nitrate used is consumed; adding to said reaction vessel gelatin in an amount of more than 50% of a total amount of gelatin used in the said method; growing said silver halide crystal nuclei by further precipitation of silver halide by means of double-jet precipitation of an aqueous silver nitrate solution and an aqueous solution comprising halide ions, wherein more than 90% by weight of a total amount of silver nitrate is consumed, concentrating by ultrafiltration the said reaction mixture volume in the said reaction vessel obtained during precipitation growth steps. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6403295-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6630292-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6686118-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6686117-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6686119-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6686116-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6682868-B1 |
| priorityDate | 1997-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 73.