US4988604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High contrast photographic element including an aryl sulfonamidophenyl hydrazide containing both thio and ethyleneoxy groups
Assignee: Eastman Kodak Co
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Filing: 1990-05-24
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Granted: 1991-01-29
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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 R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, 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 13:58
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/061; G03C5/00; G03C5/26; G03C5/264; G03C5/266
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 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: ##STR19## where R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, and R 1 is hydrogen or a blocking group.
Claim 2
Dependent Claim
74 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: ##STR19## where R is a monovalent group comprised of at least three repeating ethyleneoxy units, m is 1 to 6, Y is a divalent aromatic radical, and R 1 is hydrogen or a blocking group.
Claim 3
Dependent Claim
19 words
A photographic element as claimed in claim 1 wherein said hydrazide has a partition coefficient of at least three.
Claim 4
Dependent Claim
12 words
A photographic element as claimed in claim 1 wherein Y is phenylene.
Claim 5
Dependent Claim
13 words
A photographic element as claimed in claim 1 wherein Y is alkyl-substituted phenylene.
Claim 6
Dependent Claim
13 words
A photographic element as claimed in claim 1 wherein R 1 is hydrogen.
Claim 7
Dependent Claim
44 words
A photographic element as claimed in claim 1 wherein R 1 is ##STR20## where R 2 is hydroxy or a hydroxy-substituted alkyl group having from 1 to 4 carbon atoms and R 3 is an alkyl group having from 1 to 4 carbon atoms.
Claim 8
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 9
Dependent Claim
15 words
A photographic element as claimed in claim 1 wherein said hydrazide has the formula: ##STR21##
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) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |