| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2e45d5c58a08f4c4031b2d90e380d4cb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b991553bab7e7f3b1b5e5db91e4a00b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ae4641d555c93673dba4f9a6ddc6563c |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C2001-108 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-061
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-54 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-00
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^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a510d04e4d27035215aa35b8cea92812
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20172898dba1b51fc73acdd8bbb03b78 |
| publicationDate |
1997-11-13^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-9742546-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^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |