Patent US3905950A successfully refreshed from Google Patents.
US3905950A
Expired / Lapsed
US
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Reactive disazo dyestuffs containing 1-aminoalkyl-6-hydroxypyrid-6-one and monochlorotriazinyl groupings
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-06-04
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Granted: 1975-09-16
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Expires: 1993-06-04
Abstract
Abstract Disazo dyestuffs of the formula: wherein N IS 0, 1 OR 2 P IS 0, 1 OR 2 Q IS 2 OR 3 AND Q is a member of the group consisting of 4,6-disulpho-1,3phenylene, 2,5-disulpho-1,4-phenylene, D R A W I N G in which Q1 is a direct link or -CH CH-, -NH-CONH-, -S-, OCH2CH2O-, -CH2- or -CH2CH2- . These dyestuffs are greenish-yellow cellulose-reactive dyes of good fastness to washing, light, hypochlorite bleaching and to acid and alkali treatments. Mixtures with phthalocyanine dyes exhibit better resistance to catalytic wet fading than similar dyes based on pyrazolone coupling components.
Inventors
- 👤 Allen Crabtree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:29
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/043; C09B62/002; C09B62/006; C09B62/0067; C09B62/08; C09B62/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
6 words
A DIAZO DYESTUFF OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A DIAZO DYESTUFF OF THE FORMULA:
Claim 3
Dependent Claim
34 words
A disazo dyestuff as claimed in claim 1 wherein n is 1, this SO3H group being in the 5- or 6-position of the naphthalene ring, p is 1 or 2 and q is 2.
Claim 4
Dependent Claim
22 words
A disazo dyestuff as claimed in claim 2, having the formula A - Tr- Dm - Tr - A wherein A is
Claim 5
Dependent Claim
23 words
A disazo dyestuff as claimed in claim 2 having the formula A - Tr - Dm - Tr - A wherein A is
Claim 6
Dependent Claim
23 words
A disazo dyestuff as claimed in claim 2 having the formula A - Tr - Dm - Tr - A wherein A is
Claim 7
Dependent Claim
23 words
A disazo dyestuff as claimed in claim 2 having the formula A - Tr - Dm - Tr - A wherein A is
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |