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US5041355A
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High contrast photographic element including an aryl sulfonamidophenyl hydrazide containing ethyleneoxy groups
Assignee: Eastman Kodak Co
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Filing: 1990-05-24
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Granted: 1991-08-20
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Expires: 2010-05-24
Abstract
Abstract Silver halide photographic elements which are capable of high contrast development having incorporated therein, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: ##STR1## where each R is a monovalent group comprised of at least three repeating ethyleneoxy units, n is 1 to 3, and R 1 is hydrogen or a blocking group.
Inventors
- 👤 Harold I. Machonkin
- 👤 Donald L. Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:43
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A silver halide photographic element adapted to form a high contrast image upon development with an aqueous alkaline developing solution, said element including at least one layer comprising, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: ##STR17## where each R is a monovalent group comprised of at least three repeating ethyleneoxy units and n is 1 to 3.
Claim 2
Dependent Claim
61 words
A silver halide photographic element adapted to form a high contrast image upon development with an aqueous alkaline developing solution, said element including at least one layer comprising, as a nucleating agent, an aryl sulfonamidophenyl hydrazide of the formula: ##STR17## where each R is a monovalent group comprised of at least three repeating ethyleneoxy units and n is 1 to 3.
Claim 3
Dependent Claim
27 words
A photographic element as claimed in claim 1 wherein each R is a monovalent group comprised of at least six and up to fifty repeating ethyleneoxy units.
Claim 4
Dependent Claim
19 words
A photographic element as claimed in claim 1 wherein said hydrazide has a partition coefficient of at least three.
Claim 5
Dependent Claim
33 words
A photographic element as claimed in claim 1 wherein said hydrazide is present in said element in an amount of from about 5×10 -4 to about 5×10 -2 moles per mole of silver.
Claim 6
Dependent Claim
15 words
A photographic element as claimed in claim 1 wherein said hydrazide has the formula: ##STR18##
Claim 7
Dependent Claim
15 words
A photographic element as claimed in claim 1 wherein said hydrazide has the formula: ##STR19##
References Cited (Backward Citations)
US4681836A
Cited
US4824774A
Cited
EP0286840A1
Cited
US4971890A
Cited
US4912016A
Cited
US4933273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |