US4316972A
Expired / Lapsed
US
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Polymers from nitrogen heterocyclic compounds
Assignee: Eastman Kodak Co
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Filing: 1980-05-15
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Granted: 1982-02-23
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Expires: 2000-05-15
Abstract
Abstract A photographic element comprises a support having thereon a layer containing a novel polymer comprising a recurring unit having the formula: ##STR1## said element comprising a source of metal ions. The elements are useful in diffusion transfer processes, and particularly useful with chelating dyes or dye-forming materials to provide a metallized dye image.
Inventors
- 👤 Karel L. Petrak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:21
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; C; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F226/00; C08F226/02; C08F228/00; C08F228/02; C08F26/00; C08F26/06; G03C8/42; G03C8/52; G03C8/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A water-soluble polymer comprising a recurring unit of the formula: ##STR25## wherein: L is selected from the group consisting of a single bond and a bivalent linking group; Z represents the atoms necessary to complete a heterocyclic nucleus; R is selected from the group consisting of a single bond and alkylene; R 1 is selected from the group consisting of OH, COOH, NHR 4 , NHCOR 3 , NHSO 2 R 5 , C(R 4 )═O, C(R 4 )═NR 5 and SO 2 NHR 4 ; and R 2 is selected from the group consisting of COOH, C(R 4 )═O, C(R 4 )═NR 5 and SO 2 NHR 4 ; wherein R 3 is alkyl, R 4 is H or alkyl, R 5 is OH, NHR 6 , alkyl, aryl or substituted aryl, and R 6 is aryl or CONH 2 ; and X - is an anion.
Claim 2
Dependent Claim
148 words
A water-soluble polymer comprising a recurring unit of the formula: ##STR25## wherein: L is selected from the group consisting of a single bond and a bivalent linking group; Z represents the atoms necessary to complete a heterocyclic nucleus; R is selected from the group consisting of a single bond and alkylene; R 1 is selected from the group consisting of OH, COOH, NHR 4 , NHCOR 3 , NHSO 2 R 5 , C(R 4 )═O, C(R 4 )═NR 5 and SO 2 NHR 4 ; and R 2 is selected from the group consisting of COOH, C(R 4 )═O, C(R 4 )═NR 5 and SO 2 NHR 4 ; wherein R 3 is alkyl, R 4 is H or alkyl, R 5 is OH, NHR 6 , alkyl, aryl or substituted aryl, and R 6 is aryl or CONH 2 ; and X - is an anion.
References Cited (Backward Citations)
US3758445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |