US2614925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercapto azoles in developer for mixed grain photographic process
Assignee: Eastman Kodak Co
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Filing: 1949-12-20
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Granted: 1952-10-21
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Expires: 1969-12-20
Abstract
No abstract record available.
Inventors
- 👤 Burt H Carroll
- 👤 Forrest A Richey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF CONTROLLING THE INTER-IMAGE EFFECTS IN THE DEVELOPMENT OF A SILVER HALIDE EMULSION LAYER CONTAINING AT LEAST TWO SETS OF SILVER HALIDE GRAINS, EACH SET BEING SENSITIVE TO A DIFFERENT SPECTRAL REGION, WHICH COMPRISES EXPOSING SAID LAYER TO A COLORED OBJECT OR IMAGE AND DEVELOPING IT IN A BLACK-AND-WHITE DEVELOPER CONTAINING AN AZOLE HAVING A MERCAPTO SUBSTITUENT, AND THEN SUCSESSIVELY EXPOSING THE SETS OF RESIDUAL SILVER HALIDE GRAINS TO LIGHT TO WHICH EACH SET IS SENSITIVE AND SUCCESSIVELY DEVELOPING SAID SETS OF SILVER HALIDE GRAINS TO DIFFERENT COLORED IMAGES IN SAID LAYER WITH DIFFERENT COLORFORMING DEVELOPER SOLUTIONS.
Claim 2
Independent Claim
99 words
THE METHOD OF CONTROLLING THE INTER-IMAGE EFFECTS IN THE DEVELOPMENT OF A SILVER HALIDE EMULSION LAYER CONTAINING AT LEAST TWO SETS OF SILVER HALIDE GRAINS, EACH SET BEING SENSITIVE TO A DIFFERENT SPECTRAL REGION, WHICH COMPRISES EXPOSING SAID LAYER TO A COLORED OBJECT OR IMAGE AND DEVELOPING IT IN A BLACK-AND-WHITE DEVELOPER CONTAINING AN AZOLE HAVING A MERCAPTO SUBSTITUENT, AND THEN SUCSESSIVELY EXPOSING THE SETS OF RESIDUAL SILVER HALIDE GRAINS TO LIGHT TO WHICH EACH SET IS SENSITIVE AND SUCCESSIVELY DEVELOPING SAID SETS OF SILVER HALIDE GRAINS TO DIFFERENT COLORED IMAGES IN SAID LAYER WITH DIFFERENT COLORFORMING DEVELOPER SOLUTIONS.
References Cited (Backward Citations)
US2403927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |