US4329283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxypyridone azo dyestuffs
Assignee: Bayer AG
•
Filing: 1979-11-01
•
Granted: 1982-05-11
•
Expires: 1999-11-01
Abstract
Abstract Disperse dyestuffs of the formula ##STR1## in which R, R 1 and R 2 denotes alkyl, E denotes A or B, A denotes alkyl, alkenyl, cycloalkyl or aralkyl, B denotes aryl, m denotes the numbers 2-4, Y and Z denotes R, Cl, Br or O--E and X denotes R, Cl, Br, CHO, CO--E, COO--A, CONR--E, SO 2 --E, SO 2 O--B, SO 2 NR--E, CN, NO 2 , CF 3 or Y--C 6 H 4 --N═N-- with the proviso that Y and Z represent H, Cl, Br or O--E if X denotes 4-nitro, are especially suitable for the dyeing of polyester material since they give deep dyeings with high fastness to sublimation and interesting greenish-tinged yellow shade on that material.
Inventors
- 👤 Henning Reel
- 👤 Klaus Leverenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:13
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/84; C07D213/85; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626; C09B29/363; C09B31/00; C09B31/02; C09B31/12; C09B31/14; C09B31/153; C09B43/00; C09B43/18; C09B43/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
64 words
An azo disperse dyestuff of the formula ##STR20## in which E is C 1 -C 4 -alkyl, X is H, Cl or NO 2 , Y is H, Cl, Cl 1 -C 4 -alkyl, OCH 3 or OC 6 H 5 , and Z is H or Cl, with the proviso that when X is H or Cl both Y and Z are Cl.
Claim 2
Dependent Claim
64 words
An azo disperse dyestuff of the formula ##STR20## in which E is C 1 -C 4 -alkyl, X is H, Cl or NO 2 , Y is H, Cl, Cl 1 -C 4 -alkyl, OCH 3 or OC 6 H 5 , and Z is H or Cl, with the proviso that when X is H or Cl both Y and Z are Cl.
Claim 3
Dependent Claim
14 words
An azo dyestuff according to claim 1, in which X is H or Cl.
Claim 4
Dependent Claim
20 words
An azo dyestuff according to claim 1, in which X is H and E is n--C 4 H 9 .
Claim 5
Dependent Claim
14 words
An azo dyestuff according to claim 1, in which X is NO 2 .
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) | 1985-05-10 | 1985-11-09 | 1986-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-10 | 1989-11-09 | 1990-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-10 | 1993-11-09 | 1994-05-11 | $7700.00 | Window Closed / Lapsed |