US3843623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-hydroxy-5-lower alkyl-4'(4-lower alkoxy-6-sulpho or sulphato-hydrocarbylamino-1:3:5-triazine-2-lamino)-azobenzene
Assignee: Bayer AG
•
Filing: 1972-01-18
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Granted: 1974-10-22
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Expires: 1992-01-18
Abstract
Abstract IN WHICH R1 represents an alkyl radical, R2 represents hydrogen or alkyl, R3 represents an alkyl, aryl or aralkyl radical, X represents an alkylene, aralkylene or arylene radical, Y represents a direct bond or -0-, N REPRESENTS 0 OR 1 AND THEIR USE FOR DYEING NATURAL AND SYNTHETIC FIBRE MATERIALS, ESPECIALLY FOR DYEING POLYAMIDE FIBRES. Dyeings obtained show very good fastness to light. Monoazo dyestuffs which in the form of the free acid correspond to the general formula
Inventors
- 👤 E Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:50
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/12; C09B43/136; C09B43/16; C09B62/00; C09B62/44; C09B62/78; C09B62/82; C09B62/825
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
14 words
MONOAZO DYESTUFF, WHICH IN THE FORM OF THE FREE ACID, CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
14 words
MONOAZO DYESTUFF, WHICH IN THE FORM OF THE FREE ACID, CORRESPONDS TO THE FORMULA
Claim 3
Dependent Claim
14 words
Monoazo dyestuff, which in the form of the free acid, corresponds to the formula
Claim 4
Dependent Claim
14 words
Monoazo dyestuff, which in the form of the free acid, corresponds to the formula
Claim 5
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 6
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 7
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 8
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 9
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 10
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 11
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 12
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 13
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 14
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 15
Dependent Claim
5 words
Monoazo dyestuff of the formula
Claim 16
Dependent Claim
5 words
Monoazo dyestuff of 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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |