Patent US4442201A successfully refreshed from Google Patents.
US4442201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of a silver halide photographic light-sensitive material
Assignee: Konica Minolta Inc
•
Filing: 1982-07-07
•
Granted: 1984-04-10
•
Expires: 2002-07-07
Abstract
Abstract A method for producing a silver halide photographic light-sensitive material having on a support thereof at least one layer formed of an emulsion containing light-sensitive silver halide particles sensitized by a sensitizing dye comprising the steps of adding a first sensitizing dye to an emulsion containing silver halide particles, during the chemical ripening of the silver halide particles, to sensitize the silver halide particles; adding a second sensitizing dye to the emulsion containing the sensitized silver halide particles, after the chemical ripening of the silver halide particles, to form a coating liquid; and coating a support with the coating liquid to produce a silver halide photographic light-sensitive material.
Inventors
- 👤 Syun Takada
- 👤 Takashi Kadowaki
- 👤 Mitsuhiro Okumura
- 👤 Shinichi Nakamura
- 👤 Masaru Iwagaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:39
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
A method of producing a silver halide photographic emulsion coating liquid comprising the steps of: (a) adding a first sensitizing dye to an emulsion containing silver halide particles, during the chemical ripening of the silver halide particles, to sensitize the silver halide particles; and (b) adding a second sensitizing dye to the emulsion containing the sensitized silver halide particles, after the chemical ripening of the silver halides particles, to form a coating liquid.
Claim 2
Independent Claim
73 words
A method of producing a silver halide photographic emulsion coating liquid comprising the steps of: (a) adding a first sensitizing dye to an emulsion containing silver halide particles, during the chemical ripening of the silver halide particles, to sensitize the silver halide particles; and (b) adding a second sensitizing dye to the emulsion containing the sensitized silver halide particles, after the chemical ripening of the silver halides particles, to form a coating liquid.
Claim 3
Dependent Claim
36 words
A method according to claim 1, wherein the coating liquid is prepared by adding the second sensitizing dye in the quantity of from 5 to 500% by weight of the amount of the first sensitizing dye.
Claim 4
Dependent Claim
19 words
A method according to claim 1, wherein the first sensitizing dye and the second sensitizing dye are the same.
Claim 5
Dependent Claim
21 words
A method according to claim 1, wherein the first sensitizing dye and the second sensitizing dye are different from each other.
Claim 6
Dependent Claim
227 words
A method according to claim 1, wherein the first sensitizing dye or second sensitizing dye is represented by the formulas (I) through (VII). ##STR9## wherein R 1 , R 2 and R 3 independently represent an alkyl or an aryl group; L 1 , L 2 and L 3 represent a methinyl group; Z 1 , Z 2 and Z 3 represent an atom or a group of atoms necessary to complete a 5- or 6-member heterocyclic nucleus; P and Q independently represent a cyano group, --COOR 4 , --COR 4 or --SO 2 R 4 wherein R 4 is an alkyl group; Q 1 and Q 2 independently represent a group of atoms necessary to form a thiooxazolone ring, a pyrazolone ring, an oxyindole ring, a barbituric acid group, a 2-thiobarbituric acid group, 2,4-oxazolidinedione ring 2,4-thiazolidinedione ring, 2,4-imidazolidinedione ring, 2-thio-2,4-oxa-zolidinedione ring, 2-thio-2,4-thiazolidine dione ring, 2-thio-2,4-selenazolidine-dione ring, 2-thio-2,5-thiazolidinedione ring, 2-thiohydantoin ring, 4-oxazolinone ring, 4-thiazolinone ring or 4-imidazolinone ring; Y represents a hydrogen atom or a group selected from the group consisting of an amino, an alkylamino, a dialkylamino, a halogen, an alkoxy and an alkyl; m 1 and m 2 independently represents 0 or 1; n 1 and n 2 independently represent 0 or 2; X represents an anion group; and l represents 1 or 2, provided when the compound forms an inner salt, l is 1.
Claim 7
Independent Claim
111 words
A method for producing a silver halide photographic light-sensitive material having on a support thereof at least one layer formed of an emulsion containing light-sensitive silver halide particles sensitized by a sensitizing dye comprising the steps of: (a) adding a first sensitizing dye to an emulsion containing silver halide particles, during the chemical ripening of the silver halide particles, to sensitize the silver halide particles; (b) adding a second sensitizing dye to the emulsion containing the sensitized silver halide particles, after the chemical ripening of the silver halide particles, to form a coating liquid; and (c) coating a support with the coating liquid to produce a silver halide photographic light-sensitive material.
Claim 8
Independent Claim
111 words
A method for producing a silver halide photographic light-sensitive material having on a support thereof at least one layer formed of an emulsion containing light-sensitive silver halide particles sensitized by a sensitizing dye comprising the steps of: (a) adding a first sensitizing dye to an emulsion containing silver halide particles, during the chemical ripening of the silver halide particles, to sensitize the silver halide particles; (b) adding a second sensitizing dye to the emulsion containing the sensitized silver halide particles, after the chemical ripening of the silver halide particles, to form a coating liquid; and (c) coating a support with the coating liquid to produce a silver halide photographic light-sensitive material.
Claim 9
Dependent Claim
18 words
The method according to claim 6, further comprising the step of drying the coating liquid on the support.
Claim 10
Dependent Claim
19 words
A method according to claim 6, wherein the silver halide photographic light-sensitive material is a color photographic light-sensitive 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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |