US3849138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photography
Assignee: APPLIED PHOTO SCIENCES
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Filing: 1972-01-06
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Granted: 1974-11-19
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Expires: 1992-01-06
Abstract
Abstract A color photographic film with extended exposure response characteristics having a plurality of emulsion layers divided into sets, each set having a different photographic speed. The emulsion layers within a set have the same photographic speed but each layer is responsive to a different region of the spectrum. The emulsion layers are arranged either one above the other or side-by-side in a geometric pattern and all have D-log E characteristic curves which have substantially equal slopes. The effective speed of one set is adjusted such that it commences responding to impinging light as another set approaches saturation. This is accomplished either by selection of the basic sensitivities of the various emulsions or by the use of auxiliary means such as attenuating filters. Dye-forming couplers may be incorporated during manufacture in all emulsion layers or may be introduced during processing. The invention may also be incorporated into a number of embodiments employing either the diazo or diffusion transfer processes. In addition apparatus employing the principles of the invention is described.
Inventors
- 👤 C Wyckoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:14
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/26; G03C1/00; G03C1/005; G03C1/46; G03C1/76; G03C1/805; G03C7/30; G03C7/3029
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
103 words
A NATURAL COLOR PHOTOGRAPHIC FILM COMPRISING: AT LEAST TWO GROUPS OF PHOTOSENSITIVE EMULSIONS, EACH GROUP BEING SENSITIVE TO A DIFFERENT SPECTRAL REGION; EACH OF SAID GROUPS COMPRISING A PLURALITY OF EMULSIONS OF DIFFERENT EFFECTIVE SPEEDS; ALL OF SAID EMULSIONS BEING CAPABLE OF PRODUCING A COLOR IMAGE, AND BEING CHARACTERIZED BY D-LOG E CURVES OF SUBSTANTIALLY EQUAL SLOPE, AND BEING IN PHOTOGRAPHICALLY ACTIVE RELATIONSHIP TO EACH OTHER TO PRODUCE A SINGLE NATURAL COLOR IMAGE; AND THE EFFECTIVE SPEED OF ONE EMULSION IN EACH OF SAID GROUPS BEING SUCH THAT IT COMMENCES RESPONDING TO IMPINGING LIGHT AS ANOTHER EMULSION IN THE SAME GROUP APPROACHES SATURATION.
Claim 2
Dependent Claim
103 words
A NATURAL COLOR PHOTOGRAPHIC FILM COMPRISING: AT LEAST TWO GROUPS OF PHOTOSENSITIVE EMULSIONS, EACH GROUP BEING SENSITIVE TO A DIFFERENT SPECTRAL REGION; EACH OF SAID GROUPS COMPRISING A PLURALITY OF EMULSIONS OF DIFFERENT EFFECTIVE SPEEDS; ALL OF SAID EMULSIONS BEING CAPABLE OF PRODUCING A COLOR IMAGE, AND BEING CHARACTERIZED BY D-LOG E CURVES OF SUBSTANTIALLY EQUAL SLOPE, AND BEING IN PHOTOGRAPHICALLY ACTIVE RELATIONSHIP TO EACH OTHER TO PRODUCE A SINGLE NATURAL COLOR IMAGE; AND THE EFFECTIVE SPEED OF ONE EMULSION IN EACH OF SAID GROUPS BEING SUCH THAT IT COMMENCES RESPONDING TO IMPINGING LIGHT AS ANOTHER EMULSION IN THE SAME GROUP APPROACHES SATURATION.
Claim 3
Dependent Claim
15 words
A color photographic film as in claim 1 in which each emulsion contains dye-forming couplers.
Claim 4
Dependent Claim
21 words
A color film as in claim 1 including means for adjusting the spectral response of at least one group of emulsions.
Claim 5
Dependent Claim
33 words
A color film as in claim 1 including means for adjusting the speed of at least one emulsion to provide it with an effective speed complementary to a second emulsion in its group.
Claim 6
Dependent Claim
15 words
A color film as in claim 4 wherein said means is a neutral density filter.
Claim 7
Dependent Claim
17 words
A color photographic film as in claim 1 wherein the emulsions are sensitized photographic silver halide emulsions.
Claim 8
Dependent Claim
22 words
A color photographic film as in claim 1 wherein the emulsions of at least one group are blended into a single layer.
Claim 9
Dependent Claim
21 words
The color film of claim 1 wherein the actual speeds of the emulsions in each group are complementary to each other.
Claim 10
Dependent Claim
14 words
The color film of claim 4 wherein said adjusting means is a color filter.
Claim 11
Dependent Claim
29 words
The color film of claim 1 including: a group of blue-record silver halide emulsions, a group of green-record silver halide emulsions; and a group of red-record silver halide emulsions.
Claim 12
Dependent Claim
122 words
As an article of manufacture, a natural color photographic film product comprising: first and second sets of photosensitive emulsions registered together in photographically active relationship to each other to produce a single photographic image; each emulsion in said first set being sensitive to a different region of the spectrum, the emulsions within said set haviNg substantially the same speed; the emulsions in the second set having substantially the same spectral response as the emulsions of the first set; all emulsions of both sets being characterized by D-log E curves of substantially equal slope; and the effective speed of the emulsions in the first set being such that they commence responding to impinging light when the emulsions of the second set approach saturation.
Claim 13
Dependent Claim
122 words
As an article of manufacture, a natural color photographic film product comprising: first and second sets of photosensitive emulsions registered together in photographically active relationship to each other to produce a single photographic image; each emulsion in said first set being sensitive to a different region of the spectrum, the emulsions within said set haviNg substantially the same speed; the emulsions in the second set having substantially the same spectral response as the emulsions of the first set; all emulsions of both sets being characterized by D-log E curves of substantially equal slope; and the effective speed of the emulsions in the first set being such that they commence responding to impinging light when the emulsions of the second set approach saturation.
Claim 14
Dependent Claim
24 words
A color photographic film as claimed in claim 11 in which: said first and second sets of emulsions have substantially the same photographic speed.
Claim 15
Dependent Claim
42 words
The photographic film product of claim 11 wherein said first set of emulsions comprise a first photographic film, the second set of emulsions comprise a second photographic film and the first and second films are registered together to form a single image.
Claim 16
Dependent Claim
21 words
The color photographic film product as claimed in claim 11 in which the second set of emulsions are fast ammoniacal emulsions.
Claim 17
Dependent Claim
32 words
A color photographic film product as claimed in claim 11 wherein each set of emulsions contains a red-sensitive silver halide emulsion, a green-sensitive silver halide emulsion, and a blue-sensitive silver halide emulsion.
Claim 18
Dependent Claim
17 words
A photographic film product as in claim 11 wherein the emulsions are sensitized photographic silver halide emulsions.
Claim 19
Dependent Claim
21 words
A color photographic film product as in claim 11 including means for adjusting the spectral response of at least one emulsion.
Claim 20
Dependent Claim
39 words
A color photographic film product as in claim 11 including means for adjusting the speed of at least one emulsion in the first set to provide it with an effective speed complementary to an emulsion in the second set.
Claim 21
Dependent Claim
86 words
A photographic film which includes: a group of photosensitive silver halide emulsions arranged in photographically-active relationship to each other to produce a single photographic image, each emulsion in the group being responsive to substantially the same band of spectral wavelength and being capable of producing an image; the relative effective speeds of the emulsions being such that at least one emulsion commences responding to impinging light when another emulsion approaches saturation; and all of said emulsions being characterized by D-log E curves of substantially equal slope.
Claim 22
Dependent Claim
86 words
A photographic film which includes: a group of photosensitive silver halide emulsions arranged in photographically-active relationship to each other to produce a single photographic image, each emulsion in the group being responsive to substantially the same band of spectral wavelength and being capable of producing an image; the relative effective speeds of the emulsions being such that at least one emulsion commences responding to impinging light when another emulsion approaches saturation; and all of said emulsions being characterized by D-log E curves of substantially equal slope.
Claim 23
Dependent Claim
27 words
The film of claim 19 wherein the actual speeds of the emulsions are such that one emulsion commences responding to impinging light when another emulsion approaches saturation.
Claim 24
Dependent Claim
36 words
The film of claim 19 including means to shift the speed of at least one emulsion in the group such that it commences responding to impinging light when a second emulsion in the group approaches saturation.
Claim 25
Dependent Claim
22 words
The film of claim 21 wherein the means to shift the speed of at least one emulsion is a neutral density filter.
Claim 26
Dependent Claim
21 words
The film of claim 21 wherein the means to shift the speed of at least one emulsion is a color filter.
Claim 27
Dependent Claim
11 words
The film of claim 19 including means to support said emulsions.
Claim 28
Dependent Claim
17 words
The film of claim 19 wherein the emulsions of the group are blended into a single layer.
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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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |