| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bb0a7b16a31bf7bc8b903ed8b717aab6 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C2001-108 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-061
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-61
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-54 |
| filingDate |
1997-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_582dc74ba324b79a649b91129970d858
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e24f8a0bdc17216755d133551f32871c |
| publicationDate |
1999-02-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0897556-A1 |
| titleOfInvention |
Silver-halide recording material with improved storage stability to produce negatives with ultrahard-gradation contrast |
| abstract |
Photographic silver-halide materials for producing negatives with ultrahard-gradation gamma contrast, which contain a hydrazine compound and a contrast-boosting amino compound and/or phosphonium compound, demonstrate an undesirable increase in fog during storage. By adding a sulphite salt to the emulsion, storage-stable materials are obtained in which sensitivity and contrast are increased. The invention can be used to produce images during reproduction in the pre-printing stage. |
| priorityDate |
1996-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |