Patent US2628902A successfully refreshed from Google Patents.
US2628902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing colored photographs
Assignee: Individual
•
Filing: 1947-04-29
•
Granted: 1953-02-17
•
Expires: 1967-04-29
Abstract
No abstract record available.
Inventors
- 👤 Raibourn Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:57
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF PRODUCING A PHOTOGRAPH IN COLORS OF THE ORIGINAL SCENE, COMPRISING THE STEPS OF EXPOSING A PANCHROMATICALLY SENSITIZED SILVER HALIDE EMULSION, SAID EMULSION DYED YELLOW THROUGHOUT IN HIGH CONCENTRATION AND MAGENTA IN ABOUT ONE-HALF THE CONCENTRATION OF THE YELLOW, THE EXPOSURE AND DYEING PRODUCING AN UPPER STRATUM CONTAINING AN IMAGE OF THE BLUE, GREEN AND RED ASPECTS OF THE SCENE, A MIDDLE STRATUM CONTAINING ONLY THE GREEN AND RED ASPECTS OF THE SCENE, AND A LOWER STRATUM CONTAINING ONLY THE RED ASPECT OF THE SCENE, DEVELOPING THE UPPER STRATUM TO A BLACK SILVER IMAGE REVERSAL EXPOSING THE SILVER HALIDE OF SAID UPPER STRATUM ONLY AND, DEVELOPING IT AND THE LATENT IMAGE IN THE INTERMEDIATE STRATUM IN YELLOW, DEVELOPING THE LATENT IMAGE OF THE LOWER STRATUM TO MAGENTA, EXPOS-
Claim 2
Independent Claim
130 words
A METHOD OF PRODUCING A PHOTOGRAPH IN COLORS OF THE ORIGINAL SCENE, COMPRISING THE STEPS OF EXPOSING A PANCHROMATICALLY SENSITIZED SILVER HALIDE EMULSION, SAID EMULSION DYED YELLOW THROUGHOUT IN HIGH CONCENTRATION AND MAGENTA IN ABOUT ONE-HALF THE CONCENTRATION OF THE YELLOW, THE EXPOSURE AND DYEING PRODUCING AN UPPER STRATUM CONTAINING AN IMAGE OF THE BLUE, GREEN AND RED ASPECTS OF THE SCENE, A MIDDLE STRATUM CONTAINING ONLY THE GREEN AND RED ASPECTS OF THE SCENE, AND A LOWER STRATUM CONTAINING ONLY THE RED ASPECT OF THE SCENE, DEVELOPING THE UPPER STRATUM TO A BLACK SILVER IMAGE REVERSAL EXPOSING THE SILVER HALIDE OF SAID UPPER STRATUM ONLY AND, DEVELOPING IT AND THE LATENT IMAGE IN THE INTERMEDIATE STRATUM IN YELLOW, DEVELOPING THE LATENT IMAGE OF THE LOWER STRATUM TO MAGENTA, EXPOS-
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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) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |