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US4471046A
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4-Hydroxyalkyl-substituted 3-pyrazolidinone electron transfer agents
Assignee: Eastman Kodak Co
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Filing: 1984-02-27
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Granted: 1984-09-11
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Expires: 2004-02-27
Abstract
Abstract Photographic elements, film units, processes and alkaline processing compositions are described wherein certain 4-hydroxyalkyl-substituted 3-pyrazolidinones are employed as electron transfer agents in black-and-white and color image transfer materials. The silver halide electron transfer agents or precursors thereof have the following formula: ##STR1## wherein: n is 0, 1 or 2; R represents hydrogen or a hydrolyzable moiety; R 1 and R 2 each independently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R 1 or R 2 , but not both, may be hydrogen; and R 3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
Inventors
- 👤 Drake M. Michno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:27
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/06; C07D231/08; G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035; G03C8/00; G03C8/32; G03C8/36
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
An alkaline processing composition comprising a silver halide electron transfer agent having the following formula: ##STR14## wherein: n is 0, 1 or 2; R 1 and R 2 each indpendently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R 1 or R 2 , but not both, may be hydrogen; and R 3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
Claim 2
Dependent Claim
115 words
An alkaline processing composition comprising a silver halide electron transfer agent having the following formula: ##STR14## wherein: n is 0, 1 or 2; R 1 and R 2 each indpendently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R 1 or R 2 , but not both, may be hydrogen; and R 3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein R 1 is hydrogen or methyl.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein R 2 is hydrogen, methyl, isopropyl or phenyl.
Claim 5
Dependent Claim
17 words
The composition of claim 1 wherein R 3 is either methyl or methoxy located in the para-position.
Claim 6
Dependent Claim
121 words
A silver halide electron transfer agent compound or precursor thereof having the following formula: ##STR15## wherein: n is 0, 1 or 2; R represents hydrogen or a hydrolyzable moiety; R 1 and R 2 each independently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R 1 or R 2 , but not both, may be hydrogen; and R 3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
Claim 7
Dependent Claim
121 words
A silver halide electron transfer agent compound or precursor thereof having the following formula: ##STR15## wherein: n is 0, 1 or 2; R represents hydrogen or a hydrolyzable moiety; R 1 and R 2 each independently represents hydrogen, an alkyl or substituted alkyl group of 1 to about 6 carbon atoms, an aryl or substituted aryl group of 6 to about 10 carbon atoms, or an aralkyl group of 6 to about 10 carbon atoms, with the proviso that when n is 0, then either R 1 or R 2 , but not both, may be hydrogen; and R 3 represents at least one alkyl or alkoxy group having from 1 to about 6 carbon atoms, methylenedioxy group or ethylenedioxy group.
Claim 8
Dependent Claim
9 words
The compound of claim 5 wherein R is hydrogen.
Claim 9
Dependent Claim
12 words
The compound of claim 6 wherein R 1 is hydrogen or methyl.
Claim 10
Dependent Claim
14 words
The compound of claim 6 wherein R 2 is hydrogen, methyl, isopropyl or phenyl.
Claim 11
Dependent Claim
17 words
The compound of claim 6 wherein R 3 is either methyl or methoxy located in the para-position.
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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) | 1987-09-11 | 1988-03-12 | 1988-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-11 | 1992-03-12 | 1992-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-11 | 1996-03-12 | 1996-09-11 | $7700.00 | Window Closed / Lapsed |