US4675389A
Expired / Lapsed
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(2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids
Assignee: HD ACQUISITION CORP A CORP OF DE
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Filing: 1984-06-05
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Granted: 1987-06-23
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Expires: 2004-06-05
Abstract
Abstract Physiologically acceptable cation salts of (2-alkoxy-4-sulfonyl-5-alkylphenyl)azo-1-hydroxynaphthalene sulfonic acids useful as blue-red colorants for textile fabrics, cellulosic fibers and edible compositions are prepared by diazotizing 2-alkoxy-4-sulfonyl-5-alkylanilines and coupling the resulting diazo compounds to a 1-hydroxynaphthalene mono- or disulfonic acid.
Inventors
- 👤 Wayne L. Cook
- 👤 Robert P. Huth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:43
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/28; A; A23; A23L; A23L5/00; A23L5/40; A23L5/42; A23L5/47; C; C09; C09B; C09B29/00; C09B29/10; C09B29/16; D06; D06P; D06P1/00; D06P1/39
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
A water-soluble monoazo compound having the structural formula ##STR16## wherein: R and R 1 independently represent non-tertiary C 1 to C 4 alkyl; and X represents hydrogen or any physiologically acceptable cation.
Claim 2
Dependent Claim
32 words
A water-soluble monoazo compound having the structural formula ##STR16## wherein: R and R 1 independently represent non-tertiary C 1 to C 4 alkyl; and X represents hydrogen or any physiologically acceptable cation.
Claim 3
Dependent Claim
17 words
A water-soluble monoazo compound according to claim 1 in which R and R 1 are each methyl.
Claim 4
Dependent Claim
13 words
The water-soluble monoazo compound according to claim 2 in which X is sodium.
Claim 5
Dependent Claim
32 words
A water-soluble monoazo compound having the structural formula ##STR17## wherein: R and R 1 independently represent non-tertiary C 1 to C 4 alkyl; and X represents hydrogen or any physiologically acceptable cation.
Claim 6
Dependent Claim
32 words
A water-soluble monoazo compound having the structural formula ##STR17## wherein: R and R 1 independently represent non-tertiary C 1 to C 4 alkyl; and X represents hydrogen or any physiologically acceptable cation.
Claim 7
Dependent Claim
13 words
A water-soluble monoazo compound according to claim 4 having the structural formula ##STR18##
Claim 8
Dependent Claim
17 words
A water-soluble monoazo compound according to claim 5 in which R and R 1 are each methyl.
Claim 9
Dependent Claim
13 words
The water-soluble monoazo compound according to claim 6 in which X is sodium.
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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |