http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19738120-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C2005-3007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-30 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-295 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-3035 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-305 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-30 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-295 |
| filingDate | 1997-09-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a453f7d7996fde84d59dde64fe00b66f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f2e24c097fa84ac4dd5d92b6ee4531fd |
| publicationDate | 1998-03-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-19738120-A1 |
| titleOfInvention | A developer composition for photographic silver halide emulsions containing an ascorbic acid type developer and an accelerator |
| abstract | Aqueous developer for photographic silver halide, which is free from hydroquinone, contains an ascorbic acid-type developer (I), co-developer of the phenidone type and development accelerator. The novel features are that (i) the co-developer is a 1-phenyl-pyrazolidin-3-one of formula (II) and (ii) the development accelerator (III) is (a) a thioether with ammonium group(s), (b) a triazolium thiolate or (c) a substituted thioalkane; in which R<1>-R<7> = H, alkyl, an optionally substituted alkoxy or aryloxy group or a group of formula (X)p-A-(Sol); p = 0 or 1; X = O, S or amino (-NR<8>-); R<8> = H, alkyl or A-(Sol); A = -(CH2)q-, Phe, -(CH2)y-Phe- or -Phe-(CH2)y-; Phe = phenylene; q = 0-5; y = 1-3; (Sol) = a solubilising group of formula CO2H, SO3H, NHSO2R<10>, SO2NH2, SO2NHR<10>, polyhydroxyalkyl, -CH(SO3H)-C(O)-R<11>, -C(O)-CH(SO3H)-R<12> or -CH(SO3H)-CN; R<10> = alkyl or aryl; R<11> = OH, alkyl or aryl; R<12> = H, alkyl or aryl; provided that (a) at least one of R<1>-R<7> contains a (Sol) group and (b) A = a covalent linkage. |
| priorityDate | 1996-09-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 65.