http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-720812-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9799ffcda2dbb45041a5ab0fd08dd5fe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C7-413 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C7-413 |
| filingDate | 1953-03-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1954-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-720812-A |
| titleOfInvention | Improvements in photographic developers |
| abstract | 720,812. Photographic developers. KODAK, Ltd. March 13, 1953 [March 14, 1952], No. 7057/53. Class 98 (2). A photographic developing solution comprises an alkaline solution of a silver halide developing agent (e.g. p-phenylenediamine, diethyl - p - phenylenediamine, 2 - amino -5 - diethylaminotoluene, hydroquinone, or N - methyl - p - aminophenol), an alkali metal sulphite (e.g. sodium or potassium sulphite or potassium bisulphite), and an 8 - hydroxy - quinoline - 5 - sulphonic acid (e.g. 8 - hydroxy - quinoline - 5 - sulphonic acid itself) or its 7 - chloro-, 7 - bromo -, or 6 - methyl - deriva - ' tives). The alkali may be sodium carbonate, hydroxide, or metaborate, and the developer may contain a primary aliphatic amine such as ethylenediamine, guanidine, or ethanolamine, or morpholine. The use of triglycin is referred to. The 8-hydroxyquinoline-5-sulphonic acid may be incorporated in the emulsion or in an overcoating, intermediate, or backing layer. Examples of developer formulµ are given. Specification 541,589 is referred to. |
| priorityDate | 1952-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.