US3627752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble monoazo dyestuffs
Assignee: COSSELLA FARBWERKE MAINKUR AG
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Filing: 1969-01-16
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Granted: 1971-12-14
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Expires: 1989-01-16
Abstract
Abstract Water-insoluble monoazo dyestuffs of the formula: WHEREIN Y is alkylsulfonyl of one to two carbon atoms or nitro, Z is alkylsulfonyl of one to two carbon atoms or cyano, at least one of Y and Z being said alkylsulfonyl group, and X is the residue of a coupling component free from water-solubilizing groups, said dyestuffs being particularly useful for dyeing and printing synthetic fibers.
Inventors
- 👤 Dieter Cornelius
- 👤 Hanswilli Von Brachel
- 👤 Heinz Bender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:37
CPC Classifications
C; C09; C09B; C09B43/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
The water-insoluble monoazo dyestuff of claim 1 wherein Y is nitro, Z is ethylsulfonyl and X is of said formula wherein R1 is ethyl, R2 is acetoxyethyl and R3 and R4 are each hydrogen.
Claim 2
Dependent Claim
34 words
The water-insoluble monoazo dyestuff of claim 1 wherein Y and Z are each methylsulfonyl and X is of said formula wherein R1 and R2 are each ethyl and R3 and R4 are each hydrogen.
References Cited (Backward Citations)
FR1511932A
Cited
FR1511933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |