Patent US3664995A successfully refreshed from Google Patents.
US3664995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive triazine containing diazo dyestuffs
Assignee: Imperial Chemical Industries Ltd
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Filing: 1969-12-22
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Granted: 1972-05-23
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Expires: 1989-12-22
Abstract
Abstract Dyestuffs of the formula: IN WHICH D1 and D2 are azo, anthraquinone or nitro dye radicals, R1-R6 are H or lower alkyl groups, A1 and A2 are radicals of the benzene or naphthalene series and T1 is a chloro-s-triazine radical, are reactive dyestuffs for cellulose having good fastness to light and washing. They are especially notable for the high proportion which reacts with the fiber when applied from saline dyebaths.
Inventors
- 👤 Herbert Francis Andrew
- 👤 Neville Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:08
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
8 words
The dyestuff of claim 1 having the formula:
Claim 2
Dependent Claim
8 words
The dyestuff of claim 1 having the formula
Claim 3
Dependent Claim
10 words
A dyestuff as claimed in claim 1 having the formula:
Claim 4
Dependent Claim
10 words
A dyestuff as claimed in claim 1 having the formula:
Claim 5
Dependent Claim
10 words
A dyestuff as claimed in claim 1 having the formula:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |