http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-498870-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 | 1937-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1939-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-498870-A |
| titleOfInvention | Process of colour photographic development |
| abstract | 498,870. Colour photography. KODAK, Ltd. May 10, 1937, No. 24630/38. Convention date, May 9, 1936. Divided out of 500,826. [Class 98 (iii)] In a process of three-colour photography in which three colour-record silver salt images on a single support are processed to different colours, one of the records is converted into a dye image with a developing solution containing alkali, little or no sulphite, and a developing agent which forms a substituted lignone dye on development, the silver being subsequently removed without removing the dye. Two or more images may be so converted. The developing agent may be a phenol with both o-positions occupied by not readily oxidizable groups and with the p-position free or occupied by a readily displaceable group, a p-p-dihydroxy diphenyl with the o-positions occupied by not readily oxidizable . groups, or alpha-naphthols or their homologues having the 2- or 4 - position occupied by not, readily oxidizable groups and the 4- or 2- position free or occupied by a readily displaceable group. As examples, pyrogallol dimethyl ether, hydrocoerulignone, vic-mxylenol, o : o-dichlor, dibrom-, or di-iodophenol, tri-iodophenol, the monoalkyl ethers of 1:2- and 1: 4-dihydroxynaphthalene or dihydroxyanthracene, and 2-phenyl.- or tetramethoxy-alpha-naphthol. The Specification as open to inspection under Sect. 91 includes also the subjectmatter of Specification 500,826, as open to inspection under Sect. 91. This subjectmatter does not appear in the Specification as accepted. |
| priorityDate | 1936-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.