US3929487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectral balancing means for color photography
Assignee: Individual
•
Filing: 1970-12-07
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Granted: 1975-12-30
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Expires: 1990-12-07
Abstract
Abstract A photographic material comprising a spectral balancing means for color photography consisting essentially of a layer of magenta dye and yellow dye.
Inventors
- 👤 Harbans Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:31
CPC Classifications
G; G03; G03C; G03C7/00; F; F21; F21V; F21V9/00; F21V9/30; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/223; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A SPECTRAL BALANCING MEANS FOR COLOR PHOTOGRAPHY UNDER A FLUORESCENT LIGHT SOURCE CONSISTING ESSENTIALLY OF IN COMBINATION IN A SINGLE TRANSFER DYE LAYER A MAGENTA DYE AND A YELLOW DYE IN THE RATIO OF 1:1 TO 2:5 COATED AND APPLIED AS ONE OF A SINGLE LAYER AND A PELLICLE ONTO ONE OF A PHOTOGRAPHIC FILM BASE, A PHOTOGRAPHIC EMULSION AND A PHOTOGRAPHIC MATERIAL
Claim 2
Dependent Claim
63 words
A SPECTRAL BALANCING MEANS FOR COLOR PHOTOGRAPHY UNDER A FLUORESCENT LIGHT SOURCE CONSISTING ESSENTIALLY OF IN COMBINATION IN A SINGLE TRANSFER DYE LAYER A MAGENTA DYE AND A YELLOW DYE IN THE RATIO OF 1:1 TO 2:5 COATED AND APPLIED AS ONE OF A SINGLE LAYER AND A PELLICLE ONTO ONE OF A PHOTOGRAPHIC FILM BASE, A PHOTOGRAPHIC EMULSION AND A PHOTOGRAPHIC MATERIAL
Claim 3
Dependent Claim
50 words
A spectral balancing means for color photography under a fluorescent light source consisting essentially of in combination in a single layer a magenta dye and a yellow dye in the ratio of 1:1 to 2:5 incorporated into one of a photographic film base, a photographic emulsion and a photographic material.
Claim 4
Dependent Claim
50 words
A spectral balancing means for color photography under a fluorescent light source consisting essentially of in combination in a single layer a magenta dye and a yellow dye in the ratio of 1:1 to 2:5 incorporated into one of a photographic film base, a photographic emulsion and a photographic material.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |