Patent US3600178A successfully refreshed from Google Patents.
US3600178A
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Photographic emulsion containing a mercapto or thioxo group
Assignee: Agfa Gevaert NV
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Filing: 1968-02-07
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Granted: 1971-08-17
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Expires: 1988-02-07
Abstract
Abstract PHOTOGRAPHIC LIGHT-SENSITIVE SILVER HALIDE MATERIALS ARE DESCRIBED INCLUDING A NON-LIGHT-SENSITIVE WATER-PERMEABLE COLLOID LAYER AND HAVING INCORPORATED THEREIN AT LEAST ONE ORGANIC COMPOUND COMPRISING A MERCAPTO GROUP OR A THIOXO GROUP SHOWING THIOXO-THIOL TAUTOMERISM, A GROUP RENDERING THE COMPOUND FAST TO DIFFUSION IN SAID COLLOID LAYER AND A GROUP RENDERING THE MOLECULE WATER-SOLUBLE OR ALKALI-SOLUBLE. THE SAID ORGANIC COMPOUND PREVENTS YELLOWING OF THE PHOTOGRAPHIC MATERIAL.
Inventors
- 👤 Jozef Frans Willems
- 👤 Robrecht Julius Thiers
- 👤 Frans Clement Heugebaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:07
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/20; C07D239/22; C07D235/00; C07D235/02; C07D235/04; C07D235/24; C07D235/28; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/12; C07D257/00; C07D257/02; C07D257/04; C07D277/00; C07D277/60; C07D277/62; C07D277/68; C07D277/70; C07D277/72; C07D285/00; C07D285/01; C07D285/02; C07D285/04; C07D285/12; C07D285/125; C07D285/15; C07D285/16; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |