US2695233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irreversibly dischargeable photographic filter layers and method of processing film containing the same
Assignee: GAF Chemicals Corp
•
Filing: 1950-12-09
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Granted: 1954-11-23
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Expires: 1970-12-09
Abstract
No abstract record available.
Inventors
- 👤 Tulagin Vsevolod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
IN THE PROCESSING OF MULTI-LAYER PHOTOGRAPHIC COLOR MATERIAL CONTAINING THREE LIGHT SENSITIVE SILVER HALIDE EMULSION LAYERS SENSITIZED RESPECTIVELY TO THE RED, GREEN AND BLUE REGIONS OF THE SPECTRUM AND CONTAINING AS A YELLOW FILTER A WATER SOLUBLE COLLOID HAVING DISPERSED THERIEN A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
Claim 2
Dependent Claim
54 words
IN THE PROCESSING OF MULTI-LAYER PHOTOGRAPHIC COLOR MATERIAL CONTAINING THREE LIGHT SENSITIVE SILVER HALIDE EMULSION LAYERS SENSITIZED RESPECTIVELY TO THE RED, GREEN AND BLUE REGIONS OF THE SPECTRUM AND CONTAINING AS A YELLOW FILTER A WATER SOLUBLE COLLOID HAVING DISPERSED THERIEN A DYESTUFF SELECTED FROM THE CLASS CONSISTING OF THOSE OF THE FOLLOWING FORMULAE:
References Cited (Backward Citations)
US2078398A
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US2143786A
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US2186849A
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GB529440A
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FR894181A
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GB622731A
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US2388903A
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US2440070A
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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) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |