Patent US4368248A successfully refreshed from Google Patents.
US4368248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic products and processes employing novel nondiffusible 2-(2-pyridylazo)-4,5-bis(tertiary amino)phenol black dye-releasing compounds and precursors thereof
Assignee: Eastman Kodak Co
•
Filing: 1982-03-05
•
Granted: 1983-01-11
•
Expires: 2002-03-05
Abstract
Abstract Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a releasable, 2-(2-pyridylazo)-4,5-bis(tertiary amino)phenol black dye moiety or precursor thereof, such as: ##STR1## wherein: (a) R represents hydrogen, a hydrolyzable moiety or CAR; (b) R 1 and R 2 each independently represents an alkyl group of 1 to about 6 carbon atoms, CAR, or can be taken together with the nitrogen atom to which they are attached to complete a 5- or 6-membered heterocyclic ring; (c) R 3 and R 4 each independently represents an alkyl group of 1 to about 6 carbon atoms, CAR, or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring; (d) CAR represents a ballasted carrier moiety capable of releasing the diffusible black dye moiety or precursor thereof under alkaline conditions; and (e) n is 0, 1 or 2, with the proviso that when n is 0, then at least one of R, R 1 , R 2 , R 3 , or R 4 is CAR.
Inventors
- 👤 Norman W. Kalenda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:50
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/24; C09B29/26; C09B29/0025; C09B29/0029; C09B29/0048; G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
105 words
A photographic element comprising a support having thereon a coordination complex of a polyvalent metal ion and a compound having the formula: ##STR20## wherein: (a) R 1 and R 2 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring; and (b) R 3 and R 4 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring.
Claim 2
Dependent Claim
105 words
A photographic element comprising a support having thereon a coordination complex of a polyvalent metal ion and a compound having the formula: ##STR20## wherein: (a) R 1 and R 2 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring; and (b) R 3 and R 4 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring.
Claim 3
Dependent Claim
24 words
The photographic element of claim 1 wherein the metal ion is nickel (II), copper (II), zinc (II), platinum (II), palladium (II) or cobalt (II).
Claim 4
Dependent Claim
21 words
The photographic element of claim 1 wherein R 1 , R 2 , R 3 and R 4 are each methyl.
Claim 5
Dependent Claim
28 words
The photographic element of claim 1 wherein R 1 and R 2 complete a 6-membered heterocyclic ring, and R 3 and R 4 complete a 6-membered heterocyclic ring.
Claim 6
Dependent Claim
38 words
The photographic element of claim 1 wherein R 1 and R 2 complete a morpholino ring, R 3 and R 4 complete a morpholino ring, and the pyridine ring is substituted in the 5-position with a sulfonamide group.
Claim 7
Dependent Claim
20 words
The photographic element of claim 1 wherein the pyridine ring is substituted in the 5- position with a sulfonamide group.
Claim 8
Dependent Claim
97 words
A coordination complex of a polyvalent metal ion and a compound having the formula: ##STR21## wherein: (a) R 1 and R 2 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring; and (b) R 3 and R 4 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring.
Claim 9
Dependent Claim
97 words
A coordination complex of a polyvalent metal ion and a compound having the formula: ##STR21## wherein: (a) R 1 and R 2 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring; and (b) R 3 and R 4 each independently represents an alkyl group of 1 to about 6 carbon atoms or can be taken together with the nitrogen to which they are attached to complete a 5- or 6-membered heterocyclic ring.
Claim 10
Dependent Claim
24 words
The coordination complex of claim 7 wherein the metal ion is nickel (II), copper (II), zinc (II), platinum (II), palladium (II) or cobalt (II).
Claim 11
Dependent Claim
21 words
The coordination complex of claim 7 wherein R 1 , R 2 , R 3 and R 4 are each methyl.
Claim 12
Dependent Claim
28 words
The coordination complex of claim 7 wherein R 1 and R 2 complete a 6-membered heterocyclic ring, and R 3 and R 4 complete a 6-membered heterocyclic ring.
Claim 13
Dependent Claim
38 words
The coordination complex of claim 7 wherein R 1 and R 2 complete a morpholino ring, R 3 and R 4 complete a morpholino ring, and the pyridine ring is substituted in the 5-position with a sulfonamide group.
Claim 14
Dependent Claim
20 words
The coordination complex of claim 7 wherein the pyridine ring is substituted in the 5- position with a sulfonamide group.
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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |