US3884700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions containing two-equivalent benzoylacetanilide photographic couplers
Assignee: 3M Co
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Filing: 1972-12-26
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Granted: 1975-05-20
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Expires: 1992-12-26
Abstract
Abstract Two-equivalent benzoylacetanilide photographic couplers containing ballasting groups attached to an aromatic ring thereof characterized by a halogen atom in ortho position in the benzoyl residue and a halogen atom as a substituent in the reactive methylene which are substantially free of fog and produce yellow dyes substantially without orange coloration upon color development.
Inventors
- 👤 Andrea Quaglia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:20
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362; C; C07; C07C; C07C205/00; C07C205/27; C07C205/35; C07C205/36; C07C205/37; C07C205/45; C07C205/49; C07C205/56; C07C311/00; C07C311/15; C07C311/21
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING AT LEAST ONE TWO-EQUIVALENT BENZOYLACETANILIDE PHOTOGRAPHIC COUPLER CARRYING ON AN AROMATIC RING THEREOF AT LEAST ONE BALLASTING GROUP CAPABLE OF IMPARTING NON-DIFFUSING PROPERTIES TO SAID COUPLER, CHARACTERIZED BY THE FACT THAT THE COUPLER HAS A HALOGROUP AND AT LEAST ONE OF A NONFLUORINATED BETAINE OF N-OXIDE OR BROMINE ATOM AS A SUBSTITUENT IN THE REACTIVE METHYLENE, AND A HYDROGEN OR HALOGEN ATOM, OR AN ALKYL, ALKOXY, OR DIALKYLAMINO GROUP AS SUBSTITUUENT IN THE 2-POSITION IN THE ANILINE RESIDUE, AND A HYDROGEN ATOM OR AN ACYLAMINO, ACYL, ARYLOXYACRYLAMINO,ARYLAMINOSULFOXY OR ARYLSULFONAMIDO GROUP AS SUBSTITUENT IN THE 5-POSITION IN THE ANILINE RESIDUE THE SAID 2-POSITION AND 5-POSITION SUBSTITUENTS TOGETHER INCLUDING ALKYL GROUPS HAVING A TOTAL OF AT LEAST 10 CARBON ATOMS.
Claim 2
Dependent Claim
124 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING AT LEAST ONE TWO-EQUIVALENT BENZOYLACETANILIDE PHOTOGRAPHIC COUPLER CARRYING ON AN AROMATIC RING THEREOF AT LEAST ONE BALLASTING GROUP CAPABLE OF IMPARTING NON-DIFFUSING PROPERTIES TO SAID COUPLER, CHARACTERIZED BY THE FACT THAT THE COUPLER HAS A HALOGROUP AND AT LEAST ONE OF A NONFLUORINATED BETAINE OF N-OXIDE OR BROMINE ATOM AS A SUBSTITUENT IN THE REACTIVE METHYLENE, AND A HYDROGEN OR HALOGEN ATOM, OR AN ALKYL, ALKOXY, OR DIALKYLAMINO GROUP AS SUBSTITUUENT IN THE 2-POSITION IN THE ANILINE RESIDUE, AND A HYDROGEN ATOM OR AN ACYLAMINO, ACYL, ARYLOXYACRYLAMINO,ARYLAMINOSULFOXY OR ARYLSULFONAMIDO GROUP AS SUBSTITUENT IN THE 5-POSITION IN THE ANILINE RESIDUE THE SAID 2-POSITION AND 5-POSITION SUBSTITUENTS TOGETHER INCLUDING ALKYL GROUPS HAVING A TOTAL OF AT LEAST 10 CARBON ATOMS.
Claim 3
Dependent Claim
21 words
Silver halide photographic emulsions containing dispersed therein at least a coupler of claim 1 dissolved in a substantially water-imiscible organic solvent.
Claim 4
Dependent Claim
18 words
Photographic elements including a base and at least one layer of silver halide photographic emulsion of claim 1.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |