US5677120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tellurium complexes as chemical sensitizers for silver halides
Assignee: Eastman Kodak Co
•
Filing: 1996-05-23
•
Granted: 1997-10-14
•
Expires: 2016-05-23
Abstract
Abstract The invention is generally accomplished providing a silver halide emulsion comprising silver halide grains and a tellurium compound represented by Formula I:TeLnX2wherein L is thiourea or substituted thiourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N3 or Formula II <IMAGE> wherein X is COR, CSR, CNR2, CR, CAr, PR2, P(OR)2 R is alkyl or aryl.
Inventors
- 👤 Kenneth James Lushington
- 👤 Henry James Gysling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C2001/098
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
85 words
A silver halide emulsion comprising silver halide grains and a tellurium compound represented by Formula I: TeL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, or selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR7## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl wherein said tellurium compound is a sensitizer located on the surface of said grains.
Claim 2
Dependent Claim
85 words
A silver halide emulsion comprising silver halide grains and a tellurium compound represented by Formula I: TeL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, or selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR7## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl wherein said tellurium compound is a sensitizer located on the surface of said grains.
Claim 3
Dependent Claim
20 words
The emulsion of claim 1 wherein said tellurium compound is present in an amount between 0.1 and 100 μmol/mol Ag.
Claim 4
Dependent Claim
20 words
The emulsion of claim 1 wherein said tellurium compound is present in an amount between 5 and 50 μmol/mol Ag.
Claim 5
Dependent Claim
52 words
The emulsion of claim 1 wherein said tellurium compound is selected from the group consisting of Te(S 2 COEt) 2 , Te(S 2 CO-i-Pr) 2 , Te(S 2 CO-i-Bu) 2 , Te(S 2 COC 12 H 25 ) 2 , and Te{S 2 CN(CH 2 CH 2 OH) 2 } 2 .
Claim 6
Dependent Claim
20 words
The emulsion of claim 4 wherein said tellurium compound is present in an amount between 5 and 50 μmol/mol Ag.
Claim 7
Dependent Claim
22 words
The emulsion of claim 1 wherein R is selected from the group consisting of ethyl, isopropyl, and n-C 12 H 25 .
Claim 8
Dependent Claim
16 words
The emulsion of claim 1 wherein R is C n H 2n+1 wherein n=1 to 16.
Claim 9
Dependent Claim
45 words
The emulsion of claim 1 wherein L is ##STR8## wherein E=S or Se; R, R', R", and R'"=substituents selected from the group consisting of methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, n-amyl, iso-amyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, dodecyl, phenyl, p-tolyl, p-anisyl, pentafluorophenyl, and naphthyl.
Claim 10
Independent Claim
83 words
A method of sensitizing silver halide comprising providing silver halide grains and bringing said grains into contact with a tellurium compound represented by Formula I: TeL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR9## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl to sensitize said grains.
Claim 11
Independent Claim
83 words
A method of sensitizing silver halide comprising providing silver halide grains and bringing said grains into contact with a tellurium compound represented by Formula I: TeL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR9## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl to sensitize said grains.
Claim 12
Dependent Claim
52 words
The method of claim 9 wherein said tellurium compound is selected from the group consisting of Te(S 2 COEt) 2 , Te(S 2 COi-Pr) 2 , Te(S 2 COi-Bu) 2 , Te(S 2 COC 12 H 25 ) 2 , and Te{S 2 CN(CH 2 CH 2 OH) 2 } 2 .
Claim 13
Dependent Claim
21 words
The method of claim 9 wherein said Formula I compound is present in an amount between 0.1 and 100 μmol/mol Ag.
Claim 14
Dependent Claim
17 words
The method of claim 9 wherein said compound of Formula I chemically sensitizes said silver halide grain.
Claim 15
Dependent Claim
21 words
The method of claim 9 wherein said Formula I compound is present in an amount between 5 and 50 μmol/mol Ag.
Claim 16
Dependent Claim
22 words
The method of claim 9 wherein R is selected from the Group consisting of ethyl, isopropyl, and n-C 12 H 25 .
Claim 17
Dependent Claim
16 words
The method of claim 9 wherein R is C n H 2n+1 wherein n=1 to 16.
Claim 18
Dependent Claim
21 words
The method of claim 10 wherein said Formula I compound is present in an amount between 5 and 50 μmol/mol Ag.
Claim 19
Dependent Claim
45 words
The method of claim 9 wherein L is ##STR10## wherein E=S or Se; R, R', R", and R'"=substituents selected from the group consisting of methyl, ethyl, propyl, iso-propyl, n-butyl, iso-butyl, n-amyl, iso-amyl, hexyl, cyclohexyl, heptyl, octyl, nonyl, decyl, dodecyl, phenyl, p-tolyl, p-anisyl, pentafluorophenyl, and naphthyl.
Claim 20
Dependent Claim
20 words
The method of claim 9 wherein said emulsion is heated to between 30° and 90° C. to sensitize said emulsion.
Claim 21
Dependent Claim
108 words
A silver halide emulsion comprising silver halide grains and a chemical sensitizer for said silver halide grains comprising a tellurium compound represented by Formula I: TEL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, or selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR11## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl, wherein said tellurium compound is located on the surface of said grain and said tellurium compound is present in an amount of between 5 and 50 μmol/mol Ag.
Claim 22
Dependent Claim
108 words
A silver halide emulsion comprising silver halide grains and a chemical sensitizer for said silver halide grains comprising a tellurium compound represented by Formula I: TEL.sub.n X.sub.2 wherein L is thiourea or substituted thiourea, or selenourea or substituted selenourea, n is 2 or 4, X is Cl, Br, I, OCN, SCN, SeCN, TeCN, or N 3 or Formula II ##STR11## wherein X is COR, CSR, CNR 2 , CR, CAr, PR 2 , P(OR) 2 R is alkyl or aryl, wherein said tellurium compound is located on the surface of said grain and said tellurium compound is present in an amount of between 5 and 50 μmol/mol Ag.
Claim 23
Dependent Claim
52 words
The emulsion of claim 19 wherein said tellurium compound is selected from the group consisting of Te(S 2 COEt) 2 , Te(S 2 CO-i-Pr) 2 , Te(S 2 CO-i-Bu) 2 , Te(S 2 COC 12 H 25 ) 2 , and Te{S 2 CN(CH 2 CH 2 OH) 2 } 2 .
References Cited (Backward Citations)
GB1308762A
Cited
GB1396696A
Cited
US4144062A
Cited
US4152155A
Cited
US4188218A
Cited
US4251623A
Cited
WO1994003534A1
Cited
EP0599690A1
Cited
US5422232A
Cited
US5424178A
Cited
US5429916A
Cited
EP0661589A1
Cited
WO1996004189A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-10-13 | 2001-04-14 | 2001-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-13 | 2005-04-14 | 2005-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-13 | 2009-04-14 | 2009-10-14 | $7700.00 | Window Closed / Lapsed |