US3870696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzthiazole-azo-(4-n-sulfopropyl)phenyl compounds
Assignee: Crompton and Knowles Corp
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Filing: 1973-07-05
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Granted: 1975-03-11
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Expires: 1993-07-05
Abstract
Abstract Acid dyes for natural and synthetic polyamide fibers and for cellulose acetate fibers having the structure: WHEREIN R1 is an alkyl, benzyl, cyclohexyl, -CH2CH2OH, R2 is -H, -alkyl, halogen, -O- alkyl or -NHCOR4; R3 represents -H, -alkyl, -O- alkyl or -NH-COR4; R4, as used in R2 and R3, represents -alkyl, -tolyl, -phenyl or -halophenyl; R5 is -H, -NO2, halogen, -SO2-alkyl, -alkyl and -O- alkyl; R6 is -H, -NO2, halogen and alkyl; and M is -H, -Na, -K, -Li or -NH4.
Inventors
- 👤 James F Feeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
C; C09; C09B; C09B31/00; C09B31/02; C09B31/04; C09B31/041
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE STRUCTURE:
Claim 3
Dependent Claim
5 words
A compound having the structure:
Claim 4
Dependent Claim
5 words
A compound having the structure:
Claim 5
Dependent Claim
9 words
A compound according to claim 1 having the structure:
Claim 6
Dependent Claim
9 words
A compound according to claim 1 having the structure:
Claim 7
Dependent Claim
9 words
A compound according to claim 1 having the structure:
Claim 8
Dependent Claim
9 words
A compound according to claim 1 having the structure;
References Cited (Backward Citations)
US2683709A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |