US3816121A
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US
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Direct positive photographic material containing a color coupler under one micron in size and fogged silver halide grains with substantially no internal sensitivity having absorbed on the surface a desensitizing dye containing a solubilizing group
Assignee: Fujifilm Holdings Corp
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Filing: 1972-09-05
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Granted: 1974-06-11
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Expires: 1992-09-05
Abstract
Abstract A color photographic material having at least one silver halide photographic emulsion layer containing chemically fogged direct positive silver halide grains, said silver halide photographic emulsion layer simultaneously satisfying the following criteria: 1. SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING SUBSTANTIALLY NO FREE ELECTRON TRAP IN SAID SILVER HALIDE GRAINS; 2. SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING ADSORBED ON THE SURFACE OF SAID SILVER HALIDE GRAINS AN ELECTRON ACCEPTOR HAVING A WATER-SOLUBLE ANIONIC GROUP OR AN ANIONIC GROUP FORMING A BETAINE STRUCTURE; 3. SAID SILVER HALIDE EMULSION CONTAINING DROPLETS OF AN OILSOLUBLE COLOR COUPLER DISPERSED THEREIN, THE MEAN DROPLETS SIZE IN DIAMETER OF SAID COUPLER BEING SMALLER THAN ABOUT 1 MICRON; AND 4. SAID SILVER HALIDE EMULSION LAYER FORMING A COLOR IMAGE ON DEVELOPMENT WITH A COLOR DEVELOPING SOLUTION CONTAINING A PHENYLENEDIAMINE OR A DERIVATIVE THEREOF AS THE COLOR DEVELOPING AGENT IS DISCLOSED.
Inventors
- 👤 K Shiba
- 👤 A Sato
- 👤 H Amano
- 👤 H Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; G03C7/00; G03C7/30; G03C7/3022; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
16 words
SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING SUBSTANTIALLY NO FREE ELECTRON TRAP IN SAID SILVER HALIDE GRAINS;
Claim 2
Dependent Claim
16 words
SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING SUBSTANTIALLY NO FREE ELECTRON TRAP IN SAID SILVER HALIDE GRAINS;
Claim 3
Dependent Claim
31 words
SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING ADSORBED ON THE SURFACE OF SAID SILVER HALIDE GRAINS AN ELECTRON ACCEPTOR HAVING A WATER-SOLUBLE ANIONIC GROUP OR AN ANIONIC GROUP FORMING A BETAINE STRUCTURE;
Claim 4
Dependent Claim
31 words
SAID SILVER HALIDE PHOTOGRAPHIC EMULSION HAVING ADSORBED ON THE SURFACE OF SAID SILVER HALIDE GRAINS AN ELECTRON ACCEPTOR HAVING A WATER-SOLUBLE ANIONIC GROUP OR AN ANIONIC GROUP FORMING A BETAINE STRUCTURE;
Claim 5
Dependent Claim
47 words
The color photographic material of claim 1, in which said silver halide grains contain at least 50 mole percent bromine ions and less than 2 mole percent iodine ions and further in which said silver halide grains have a mean grain size of less than 0.7 micron.
Claim 6
Dependent Claim
77 words
said silver halide photographic emulsion having adsorbed on the surface of said silver halide grains a desensitizing dye electron acceptor having a water-soluble anionic group or an anionic group forming a betaine structure, selected from the class consisting of at least one sulfo group, carboxy group or phosphoric acid group, said electron acceptor having an Ered value equal to or more positive than -1.0 volt and an Eox value equal to or more positive than 0.7 volt;
Claim 7
Dependent Claim
77 words
said silver halide photographic emulsion having adsorbed on the surface of said silver halide grains a desensitizing dye electron acceptor having a water-soluble anionic group or an anionic group forming a betaine structure, selected from the class consisting of at least one sulfo group, carboxy group or phosphoric acid group, said electron acceptor having an Ered value equal to or more positive than -1.0 volt and an Eox value equal to or more positive than 0.7 volt;
Claim 8
Dependent Claim
29 words
said silver halide emulsion containing droplets of an oil-soluble color coupler dispersed therein, the mean droplets size in diameter of said coupler being smaller than about one micron; and
Claim 9
Dependent Claim
29 words
said silver halide emulsion containing droplets of an oil-soluble color coupler dispersed therein, the mean droplets size in diameter of said coupler being smaller than about one micron; and
Claim 10
Dependent Claim
21 words
The color photographic material of claim 1, in which said electron acceptor has at least one sulfoalkyl group or carboxyalkyl group.
Claim 11
Dependent Claim
29 words
SAID SILVER HALIDE EMULSION CONTAINING DROPLETS OF AN OILSOLUBLE COLOR COUPLER DISPERSED THEREIN, THE MEAN DROPLETS SIZE IN DIAMETER OF SAID COUPLER BEING SMALLER THAN ABOUT 1 MICRON; AND
Claim 12
Dependent Claim
29 words
SAID SILVER HALIDE EMULSION CONTAINING DROPLETS OF AN OILSOLUBLE COLOR COUPLER DISPERSED THEREIN, THE MEAN DROPLETS SIZE IN DIAMETER OF SAID COUPLER BEING SMALLER THAN ABOUT 1 MICRON; AND
Claim 13
Dependent Claim
30 words
SAID SILVER HALIDE EMULSION LAYER FORMING A COLOR IMAGE ON DEVELOPMENT WITH A COLOR DEVELOPING SOLUTION CONTAINING A PHENYLENEDIAMINE OR A DERIVATIVE THEREOF AS THE COLOR DEVELOPING AGENT IS DISCLOSED.
Claim 14
Dependent Claim
30 words
SAID SILVER HALIDE EMULSION LAYER FORMING A COLOR IMAGE ON DEVELOPMENT WITH A COLOR DEVELOPING SOLUTION CONTAINING A PHENYLENEDIAMINE OR A DERIVATIVE THEREOF AS THE COLOR DEVELOPING AGENT IS DISCLOSED.
Claim 15
Dependent Claim
25 words
The color photographic material of claim 1, in which the silver halide grains have a mean particle size ranging from 0.04 micron to 2 microns.
Claim 16
Dependent Claim
25 words
said silver halide emulsion layer forming a color image on development with a silver halide developing solution containing a phenylenediamine as the color developing agent.
Claim 17
Dependent Claim
25 words
said silver halide emulsion layer forming a color image on development with a silver halide developing solution containing a phenylenediamine as the color developing agent.
Claim 18
Dependent Claim
22 words
The color photographic material of claim 1, in which said silver halide is silver bromide, silver iodobromide, silver chlorobromide, or silver chloroiodobromide.
Claim 19
Dependent Claim
37 words
The color photographic material of claim 1, wherein said electron acceptor is present in said emulsion in an amount of from 1 X 10 6 mol to 5 X 10 3 mol per mol of silver halide.
Claim 20
Dependent Claim
24 words
The color photographic material of claim 1, wherein said electron accepTor is selected from the group consisting of compounds of the general formula I
Claim 21
Dependent Claim
58 words
The color photographic material of claim 7, wherein said heterocyclic nucleus is an oxazole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus, a naphthoselenazole nucleus, an indolenine nucleus, an indole nucleus, an imidazole nucleus, a benzoimidazole nucleus, an imidazoquinoxaline nucleus, or a pyrrolopyride nucleus.
Claim 22
Dependent Claim
20 words
A color photographic element comprising a support having coated thereon a layer of the color photographic materials of claim 1.
Claim 23
Dependent Claim
41 words
The color photographic material of claim 9, wherein said support is a glass sheet, a cellulose acetate film, a cellulose acetate butyrate film, a polyester film, a photographic paper, a buryta coated paper, a polyolefin coated paper, or a synthetic paper.
Claim 24
Dependent Claim
15 words
The color photographic material of claim 1, wherein said anionic group is a sulfo group.
Claim 25
Dependent Claim
15 words
The color photographic material of claim 1, wherein said anionic group is a carboxy group.
Claim 26
Dependent Claim
16 words
The colOr photographic material of claim 1, wherein said anionic group is a phosphoric acid group.
Claim 27
Dependent Claim
192 words
The color photographic material of claim 1, wherein a silver halide photographic emulsion having substantially no electron traps is determined according to the following test procedures: the silver halide emulsion layer is coated to a thickness of less than about 5 microns, exposed to blue light and white light, developed for 2 minutes at 20*C. using developer D-72 or developer D-19, and fixed, to obtain a characteristic curve of the direct positive type, a sample prepared in the above manner compared to a sample prepared identically but being degassed for longer than 17 hours at normal temperature under a reduced pressure of 10 4 mm/Hg illustrating the following relationship: the minimal optical density value Dmin of the degassed sample being higher than the optical density corresponding to 30 percent of the maximum optical density value Dmax of the non-degassed sample or the sensitivity of the degassed sample at a point of one-half of the maximum optical density thereof being lower than 65 percent of the sensitivity of the non-degassed sample at the point of one-half of the maximum optical density thereof, such a silver halide photographic emulsion having substantially no electron traps.
Claim 28
Dependent Claim
43 words
The color photographic material of claim 1, wherein said color coupler has an active methylene group substituted with a splitting-off substituent selected from the group consisting of a halogen atom, an aryldiazo group, an arylthio group, an aryloxy group or a carboxyl group.
Claim 29
Dependent Claim
27 words
The color photographic material of claim 1, wherein said color developing solution further contains a small amount of a sulfite and has a pH greater than 9.8.
Claim 30
Dependent Claim
22 words
The color photographic material of claim 1, wherein the grain size of the silver halide ranges from 0.04 microns to 2 microns.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |