US3982945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Development of silver halide emulsions
Assignee: Agfa Gevaert NV
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Filing: 1975-03-24
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Granted: 1976-09-28
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Expires: 1995-03-24
Abstract
Abstract Development of exposed photographic silver halide emulsion is described wherein development occurs by means of an organometallic complex of a metal capable of changing its valency and an aliphatic aminocarboxylic acid containing at least one mono- or di(carboxyalkyl)aminoalkyl group and at least one hydroxyl group, or a water-soluble salt of the chelating compounds.
Inventors
- 👤 Jozef Frans Willems
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:10
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3567441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |