Patent US1954588A successfully refreshed from Google Patents.
US2912343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of photographic material
Assignee: Ilford Imaging UK Ltd
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Filing: 1958-11-10
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Granted: 1959-11-10
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Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Collins Ronald Bernard
- 👤 Welford Stanley Freder William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/102; G03C1/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A METHOD OF PRODUCING COLOUR PHOTOGRAPHIC MATERIALS WHICH COMPRISES: PREPARING A COLOR SENSIZED SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE TO A SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE SENSITIZED EMULSION A COLOR COUPLER THE PRESENCE OF WHICH TENDS TO REDUCE THE SENITIVITY OF THE EMULSION, AND THERETENDS TO REDUCE THE SENSITIVELY OF THE EMULSION, AND THERELAYER AS A COATING THEREON; THE IMPROVEMENT WHICH COMPRISES; DEFERRING THE ADDITION OF THE COLOR COUPLER SOLUTION TO THE COLOR SENSITIZED EMULSION UNTIL THE COLOR SENSITIZED EMULSION HAS BEEN BROUGHT TO THE SITE AT WHICH IT IS TO BE APPLIED TO THE SUPPORT LAYER AND THEREUPON ADMIXING THE COLOR COUPLER WITH THE COLOR SENSITIZED EMULSION AND PROMPTLY THEREAFTER APPLYING THE FRESHLY FORMED ADMIXTURE TO THE SUPPORT LAYER WHEREBY THE SUPPORT IS COATED WITH THE MINIMUM POSSIBLE TIME DELAY BETWEEN THE TIME OF ADMIXING AND THE TIME OF COATING, AND THE COATING IS SET AND DRIED WITH THE MINIMUM DELAY.
Claim 2
Dependent Claim
156 words
IN A METHOD OF PRODUCING COLOUR PHOTOGRAPHIC MATERIALS WHICH COMPRISES: PREPARING A COLOR SENSIZED SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE TO A SILVER HALIDE EMULSION; THEREAFTER ADDING TO THE SENSITIZED EMULSION A COLOR COUPLER THE PRESENCE OF WHICH TENDS TO REDUCE THE SENITIVITY OF THE EMULSION, AND THERETENDS TO REDUCE THE SENSITIVELY OF THE EMULSION, AND THERELAYER AS A COATING THEREON; THE IMPROVEMENT WHICH COMPRISES; DEFERRING THE ADDITION OF THE COLOR COUPLER SOLUTION TO THE COLOR SENSITIZED EMULSION UNTIL THE COLOR SENSITIZED EMULSION HAS BEEN BROUGHT TO THE SITE AT WHICH IT IS TO BE APPLIED TO THE SUPPORT LAYER AND THEREUPON ADMIXING THE COLOR COUPLER WITH THE COLOR SENSITIZED EMULSION AND PROMPTLY THEREAFTER APPLYING THE FRESHLY FORMED ADMIXTURE TO THE SUPPORT LAYER WHEREBY THE SUPPORT IS COATED WITH THE MINIMUM POSSIBLE TIME DELAY BETWEEN THE TIME OF ADMIXING AND THE TIME OF COATING, AND THE COATING IS SET AND DRIED WITH THE MINIMUM DELAY.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |