US3865596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-positive reduction and gold fogged ammoniac silver halide emulsion
Assignee: Konica Minolta Inc
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Filing: 1973-06-11
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Granted: 1975-02-11
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Expires: 1993-06-11
Abstract
Abstract A direct positive silver halide photosensitive material comprising an ammoniac silver halide photosensitive emulsion and (a) water soluble rhodium salts or water soluble iridium salts, (b) a reducing agent, (c) a gold compound, (d) thiosulfates, thiocyanates, prussic acid salts, and (e) an optical sensitizing dye.
Inventors
- 👤 Tetsuo Furuya
- 👤 Yoshio Ibe
- 👤 Hideo Kanisawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:28
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A DIRECT POSITIVE SILIVER HALIDE PHOTOSENSITIVE MATERIAL COMPRISING AN AMMONIAC SILVER HALIDE PHOTOSENSITIVE EMULSION AND(A) AT LEAST ONE COMPOUND SELECTED FROM SOLUBLE RHODIUM SALTS AND SOLUBLE IRIDIUM SALTS, SAID COMPOUND HAVING BEEN INCOPORATED INTO SAID EMULSION IN AN AMOUNT OF 0.001 TO 10 MILLIMOLES PER MOLE OF THE SILVER HALIDE BEFORE OR AT PHYSICAL RIPENING, (B) A REDUCING AGENT IN AN AMOUNT OF 0.001 TO 100 MILLIMOLES PER MOLE OF THE SILVER HALIDE, (C) A GOLD COMPOUND IN AN AMOUNT OF 0.0001 TO 0.1 MILLIMOLES PER MOLE OF THE SILVER HALIDE, (D) AT LEAST 105 MOL PERCENT, BASED ON SAID GOLD COMPOUND, OF AT LEAST ONE COMPOUND SELECTED FEOM THIOSULFATES, THIOCYANTES, PRUSSIC ACID SALTS, AND (E) AN OPTICAL SENSITIZING DYE, SAID REDUCING AGENT AND SAID GOLD COMPOUND BEING PRESENT IN SUFFICEINT AMOUNT TO CAUSE FOGGING OF SAID SILVER HALIDE.
Claim 2
Dependent Claim
139 words
A DIRECT POSITIVE SILIVER HALIDE PHOTOSENSITIVE MATERIAL COMPRISING AN AMMONIAC SILVER HALIDE PHOTOSENSITIVE EMULSION AND(A) AT LEAST ONE COMPOUND SELECTED FROM SOLUBLE RHODIUM SALTS AND SOLUBLE IRIDIUM SALTS, SAID COMPOUND HAVING BEEN INCOPORATED INTO SAID EMULSION IN AN AMOUNT OF 0.001 TO 10 MILLIMOLES PER MOLE OF THE SILVER HALIDE BEFORE OR AT PHYSICAL RIPENING, (B) A REDUCING AGENT IN AN AMOUNT OF 0.001 TO 100 MILLIMOLES PER MOLE OF THE SILVER HALIDE, (C) A GOLD COMPOUND IN AN AMOUNT OF 0.0001 TO 0.1 MILLIMOLES PER MOLE OF THE SILVER HALIDE, (D) AT LEAST 105 MOL PERCENT, BASED ON SAID GOLD COMPOUND, OF AT LEAST ONE COMPOUND SELECTED FEOM THIOSULFATES, THIOCYANTES, PRUSSIC ACID SALTS, AND (E) AN OPTICAL SENSITIZING DYE, SAID REDUCING AGENT AND SAID GOLD COMPOUND BEING PRESENT IN SUFFICEINT AMOUNT TO CAUSE FOGGING OF SAID SILVER HALIDE.
Claim 3
Dependent Claim
29 words
A direct positive silver halide photosensitive material according to claim 1, wherein said silver halide emulsion comprises a silver bromoiodide containing 0.5 to 5 mol percent of silver iodide.
Claim 4
Dependent Claim
28 words
A direct positive silver halide photosensitive material according to claim 1, wherein the weight ratio of said gold compound to said reducing agent is from 1:3 to 1:200.
Claim 5
Dependent Claim
29 words
A direct positive silver halide photosensitive material according to claim 1, wherein said sensitizing dye is selected from sensitizing dyes represented by the following general formula (1) or (II):
Claim 6
Dependent Claim
36 words
A direct positive silver halide photosensitive material according to claim 1, which comprises said thiosulfates, thiocyanates and/or prussic acid salts being present in an amount of 0.003 to 100 millimoles per mole of the silver halide.
Claim 7
Dependent Claim
31 words
A direct positive silver halide photosensitive material according to claim 1, wherein said reducing agent is selected from formalin, hydrazine, triethylene tetramine, thiourea dioxide, imino-amino-methane-sulfonic acid, stannous chloride and amine borane.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |