Patent US5049485A successfully refreshed from Google Patents.
US5049485A
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Photographic silver halide material comprising gold compound
Assignee: Eastman Kodak Co
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Filing: 1990-11-16
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Granted: 1991-09-17
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Expires: 2010-11-16
Abstract
Abstract A photographic silver halide material is chemically sensitized with a soluble gold(I) compound of the formula: AuL.sub.2.sup.+ X.sup.- or AuL(L.sup.1).sup.+ X.sup.- wherein L is a mesoionic compound; X is an anion; and L 1 is a Lewis donor ligand. The novel gold(I) compounds possess properties which are advantageous compared to the properties of previously known gold compounds.
Inventors
- 👤 Joseph C. Deaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:07
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005; C07F9/00; C07F9/02; C07F9/547; C07F9/6515; C07F9/6518; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
38 words
A photographic silver halide emulsion chemically sensitized with a soluble gold(I) compound of the formula: AuL.sub.2.sup.+ X.sup.- or AuL(L.sup.1).sup.+ X.sup.- wherein L is a mesoionic compound; X is an anion; and L 1 is a Lewis donor ligand.
Claim 2
Dependent Claim
38 words
A photographic silver halide emulsion chemically sensitized with a soluble gold(I) compound of the formula: AuL.sub.2.sup.+ X.sup.- or AuL(L.sup.1).sup.+ X.sup.- wherein L is a mesoionic compound; X is an anion; and L 1 is a Lewis donor ligand.
Claim 3
Dependent Claim
33 words
A photographic silver halide emulsion as in claim 1 wherein L is represented by the formula: ##STR10## wherein R 1 , R 2 and R 3 individually are hydrogen or a hydrocarbon group.
Claim 4
Dependent Claim
15 words
A photographic silver halide emulsion as in claim 1 wherein the gold(I) compound is: ##STR11##
Claim 5
Dependent Claim
28 words
A photographic silver halide emulsion as in claim 1 wherein L 1 is P(R 4 ) 3 wherein R 4 is alkyl containing 1 to 5 carbon atoms.
Claim 6
Dependent Claim
26 words
A photographic silver halide emulsion as in claim 1 which is a silver bromide, silver chloride, silver bromoiodide, silver bromochloride, silver chloroiodide or silver bromochloroiodide emulsion.
Claim 7
Dependent Claim
26 words
A photographic silver halide emulsion as in claim 1 also comprising a chemical sensitizing concentration of at least one added gold, sulfur or selenium chemical sensitizer.
Claim 8
Dependent Claim
20 words
A photographic silver halide emulsion as in claim 1 also comprising at least one sulfur chemical sensitizer comprising N,N'-dicarboxymethyl-N,N'-dimethyl thiourea.
Claim 9
Dependent Claim
27 words
A photographic silver halide element comprising a support bearing at least one photographic silver halide emulsion layer comprising a photographic silver halide emulsion as in claim 1.
Claim 10
Dependent Claim
17 words
A photographic silver halide element as in claim 8 which is a color photographic silver halide element.
Claim 11
Dependent Claim
27 words
A photographic silver halide element comprising a support bearing at least one photographic silver bromoiodide emulsion chemically sensitized with a gold(I) compound represented by the formula: ##STR12##
Claim 12
Dependent Claim
27 words
A photographic silver halide element comprising a support bearing at least one photographic silver bromoiodide emulsion chemically sensitized with a gold(I) compound represented by the formula: ##STR12##
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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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |