US4247459A
Expired / Lapsed
US
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Azo dye derivatives of 2,3-naphthalenediols
Assignee: Eastman Kodak Co
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Filing: 1979-07-10
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Granted: 1981-01-27
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Expires: 1999-07-10
Abstract
Abstract Azo dye compounds of substantially neutral density which are particularly useful in liquid electrographic developers and are of the formula: ##STR1## wherein: R 1 is hydrogen, --COOH, --CONH 2 , --SO 2 NH 2 or --SO 3 M and M is a cation; R 2 is a lower alkoxy radical, --OCH 2 CONH 2 , or ##STR2## R 3 is hydrogen or nitro; and R 4 and R 5 are the same or different lower alkyl or lower hydroxyalkyl radicals.
Inventors
- 👤 John A. Ford, Jr.
- 👤 Louis J. Rossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:18
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/04; G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/122
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
65 words
A compound of the formula ##STR8## wherein: R 1 is hydrogen, --COOH, --CONH 2 , --SO 2 NH 2 or --SO 3 M and M is a cation; R 2 is a lower alkoxy radical, --OCH 2 CONH 2 , or ##STR9## R 3 is hydrogen or nitro; and R 4 and R 5 are the same or different lower alkyl or lower hydroxyalkyl radicals.
Claim 2
Dependent Claim
65 words
A compound of the formula ##STR8## wherein: R 1 is hydrogen, --COOH, --CONH 2 , --SO 2 NH 2 or --SO 3 M and M is a cation; R 2 is a lower alkoxy radical, --OCH 2 CONH 2 , or ##STR9## R 3 is hydrogen or nitro; and R 4 and R 5 are the same or different lower alkyl or lower hydroxyalkyl radicals.
Claim 3
Dependent Claim
15 words
A compound of claim 1 wherein M is Na + or NH 4 + .
Claim 4
Dependent Claim
14 words
A compound of claim 1 wherein R 2 is --OCH 2 CONH 2 .
Claim 5
Dependent Claim
10 words
A compound of claim 1 wherein R 2 is methoxy.
Claim 6
Dependent Claim
12 words
A compound of claim 4 wherein R 3 is --NO 2 .
Claim 7
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-bis(p-anisylazo)-2,3-naphthalenediol.
Claim 8
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-bis(o-anisylazo)-2,3-naphthalenediol.
Claim 9
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-bis(p-ethoxyphenylazo)-2,3-naphthalenediol.
Claim 10
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-bis(4-n-propoxyphenylazo)-2,3-naphthalenediol.
Claim 11
Dependent Claim
13 words
A compound of claim 1 wherein the compound is 1,4-bis(p-anisylazo)-2,3-dihydroxy-6-naphthalenesulfonic acid sodium salt.
Claim 12
Dependent Claim
13 words
A compound of claim 1 wherein the compound is 1,4-bis(o-anisylazo)-2,3-dihydroxy-6-naphthalenesulfonic acid sodium salt.
Claim 13
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-bis(4-anisylazo)-2,3-dihydroxy-6-naphthalenesulfonamide.
Claim 14
Dependent Claim
10 words
A compound of claim 1 wherein the compound is 1,4-(bis(5-nitro-2-anisylazo)-2,3-naphthalenediol.
Claim 15
Dependent Claim
58 words
A compound of the formula ##STR10## wherein: R 1 is hydrogen, --COOH, --CONH 2 , --SO 2 NH 2 or --SO 3 M and M is a cation; R 2 is --OCH 2 CONH 2 or ##STR11## R 3 is hydrogen; and R 4 and R 5 are the same or different lower alkyl or lower hydroxyalkyl radicals.
Claim 16
Dependent Claim
58 words
A compound of the formula ##STR10## wherein: R 1 is hydrogen, --COOH, --CONH 2 , --SO 2 NH 2 or --SO 3 M and M is a cation; R 2 is --OCH 2 CONH 2 or ##STR11## R 3 is hydrogen; and R 4 and R 5 are the same or different lower alkyl or lower hydroxyalkyl radicals.
Claim 17
Dependent Claim
14 words
A compound of claim 14 wherein R 2 is --OCH 2 CONH 2 .
Claim 18
Dependent Claim
10 words
A compound of claim 14 wherein the compound is 1,4-bis(4-carbamoylmethoxyphenylazo)-2,3-naphthalenediol.
Claim 19
Dependent Claim
10 words
A compound of claim 14 wherein the compound is 1,4-bis[p-(N-ethyl-N-2-hydroxyethylamino)-phenylazo]-2,3-naphthalenediol.
References Cited (Backward Citations)
DE82774C
Cited
US2497246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |