US4271246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a multicolor optical filter
Assignee: Fujifilm Holdings Corp
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Filing: 1979-06-28
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Granted: 1981-06-02
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Expires: 1999-06-28
Abstract
Abstract A method for producing a multicolor optical filter, which comprises exposing a photographic material comprising a support and at least one black-and-white silver halide emulsion layer to light through a first pattern; developing the exposed emulsion layer with a first coupler-containing color developer to form a pattern of a first dye; then exposing an unexposed portion of said emulsion layer to light through a second pattern; developing the exposed area with a second coupler-containing color developer to form a pattern of a second dye; optionally repeating exposure and development to form patterns containing dyes of third and subsequent colors, thereby to form color patterns of at least two colors; and subjecting the product to a silver removal treatment after the final color development step.
Inventors
- 👤 Masamichi Sato
- 👤 Kenji Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:55
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G02; G02B; G02B5/00; G02B5/20; G02B5/201; G03C7/04; G03C7/06; G03C7/10; G03C7/12; Y; Y10; Y10S; Y10S430/00; Y10S430/149; Y10S430/153
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
122 words
A method of producing a multicolor optical filter, which comprises exposing a photographic material comprising a support and one black-and-white silver halide emulsion layer to light through a first pattern; developing the exposed emulsion layer with a first coupler-containing color developer to form a pattern of a first dye; then exposing an unexposed portion of said emulsion layer to light through a second pattern; developing the exposed area with a second coupler-containing color developer to form a pattern of a second dye; optionally repeating exposure and development to form patterns containing dyes of third and subsequent colors, thereby to form color patterns of at least two colors; and subjecting the product to a silver removal treatment after the final color development step.
Claim 2
Independent Claim
122 words
A method of producing a multicolor optical filter, which comprises exposing a photographic material comprising a support and one black-and-white silver halide emulsion layer to light through a first pattern; developing the exposed emulsion layer with a first coupler-containing color developer to form a pattern of a first dye; then exposing an unexposed portion of said emulsion layer to light through a second pattern; developing the exposed area with a second coupler-containing color developer to form a pattern of a second dye; optionally repeating exposure and development to form patterns containing dyes of third and subsequent colors, thereby to form color patterns of at least two colors; and subjecting the product to a silver removal treatment after the final color development step.
Claim 3
Dependent Claim
33 words
The method of claim 1, wherein after at least one color development step other than the final one, said material is treated to substantially inhibit further color development in the color developed area.
Claim 4
Dependent Claim
11 words
The method of claim 2, wherein said treatment comprises black-and-white development.
Claim 5
Dependent Claim
20 words
The method of claim 2, wherein said treatment comprises destroying any undeveloped latent image present in the color developed areas.
Claim 6
Dependent Claim
15 words
The method of claim 1, wherein said silver removal treatment comprises fixing, bleaching or bleach-fixing.
Claim 7
Dependent Claim
24 words
The method of claim 1, wherein exposure and color development are performed three times to form independent patterns of cyan, magenta and yellow dyes.
Claim 8
Dependent Claim
24 words
The method of claim 1, wherein exposure and color development are performed three times to form independent patterns of red, green and blue dyes.
Claim 9
Independent Claim
21 words
The method of claims 2, 3, or 4, wherein color development is conducted until a suitable color image density is obtained.
Claim 10
Dependent Claim
20 words
The method of claim 1, wherein said photographic material consists of a support and a black-and-white silver halide emulsion layer.
Claim 11
Dependent Claim
15 words
The method of claim 1, wherein prior to color development said emulsion layer is hardened.
Claim 12
Dependent Claim
13 words
The method of claim 9, wherein said emulsion layer is a Lippmann emulsion.
Claim 13
Dependent Claim
21 words
The method of claim 1, wherein said support is a circular glass plate used as a faceplate of a television-camera tube.
Claim 14
Dependent Claim
14 words
The method of claim 1, wherein the color patterns are separated by black outlines.
Claim 15
Dependent Claim
27 words
The method of claim 1, wherein patterns containing more than one dye are obtained by developing a partially-color developed area with a developer containing another color coupler.
Claim 16
Dependent Claim
32 words
The method of claim 4, wherein patterns containing more than one dye are obtained by re-exposing a color-developed and latent image-destroyed area and color-developing with a color developer containing another color coupler.
Claim 17
Dependent Claim
19 words
The method of claim 1 wherein said optional exposure and development are conducted in said one black-and-white emulsion layer.
Claim 18
Dependent Claim
30 words
The method of claim 6 wherein said optional exposure and development are conducted in said one black-and-white emulsion layer, thereby yielding said independent patterns of cyan, magenta, and yellow dyes.
Claim 19
Dependent Claim
36 words
The method of claim 1 wherein cyan, yellow and magenta dyes are formed in said one black-and-white silver halide emulsion layer, and said dyes are in patterns which are regularly aligned and border on one another.
Claim 20
Dependent Claim
23 words
The method of claim 18 wherein said cyan, yellow and magenta dyes exist over substantially the whole surface of said multicolor optical filter.
Claim 21
Dependent Claim
25 words
The method of claim 1, wherein said photographic material further comprises a subbing layer between said support and said one black-and-white silver halide emulsion 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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |