US4297278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pentakis-and heptakis-azoxy dyestuffs
Assignee: Bayer AG
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Filing: 1980-03-07
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Granted: 1981-10-27
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Expires: 2000-03-07
Abstract
Abstract Polyazo dyestuffs of the formula ##STR1## wherein D denotes the radical of a diazo component and n denotes the number 1 or 2, and their use for dyeing and printing fibre materials containing amino groups or hydroxyl groups, and leather. The resulting dyeings have good properties under wet conditions and when in use.
Inventors
- 👤 Horst Nickel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:19
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/64; C09B29/00; C09B29/24; C09B29/28; C09B29/30; C09B33/00; C09B33/02; C09B33/08; C09B33/10; C09B35/02; C09B35/039; C09B35/205; C09B35/215; C09B35/35; C09B43/00; C09B43/08; C09B43/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
22 words
A polyazo dyestuff of the formula ##STR14## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 2
Dependent Claim
22 words
A polyazo dyestuff of the formula ##STR14## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 3
Dependent Claim
22 words
A polyazo dyestuff of the formula ##STR15## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 4
Dependent Claim
22 words
A polyazo dyestuff of the formula ##STR15## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 5
Dependent Claim
22 words
A polyazo dystuff of the formula ##STR16## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 6
Dependent Claim
22 words
A polyazo dystuff of the formula ##STR16## wherein D denotes the radical of a diazo component and n denotes 1 or 2.
Claim 7
Dependent Claim
8 words
A polyazo dyestuff of the formula ##STR17## .
Claim 8
Dependent Claim
8 words
A polyazo dyestuff of the formula ##STR17## .
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |