Optically sensitized silver halide emulsions
Abstract
Abstract In a photographic silver halide emulsion spectrally sensitizing the emulsion with a sensitizer of the general formula IN WHICH X is a sulfur, selenium or oxygen atom, or a group -CH CH-; n is 1-5; RI is an ethyleneoxy or a 1,2-propyleneoxy unit; RII is a saturated or unsaturated aliphatic group having up to five carbon atoms, suitably substituted; RIII is a monomethine group substituted with a five- or sixmembered heterocyclic ring containing nitrogen as ring member; or a trimethine, pentamethine or heptamethine chain carrying in the terminal position an oxazole, benzoxazole, naphthoxazole, thiazoline, thiazole, benzothiazole, naphthothiazole, selenazole, benzoselenazole, naphthoselenazole, thiadiazole, imidazole, benzimidazole or 2- or 4-quinoline ring, or a dimethine or tetramethine which carries in the terminal position a rhodanine, thiohydantoin, thiobarbituric acid or pyrazolone radical, or a rhodanine, thiohydantoin, thiobarbituric acid or pyrazolone radical.
Inventors
- 👤 Johannes Gotze
- 👤 Oskar Riester
Bibliographic Details
Claims Analysis
Total Claims: 3References Cited (Backward Citations)
No citation records indexed.
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| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |