US4060383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyestuffs
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-11-19
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Granted: 1977-11-29
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Expires: 1995-11-19
Abstract
Abstract Monoazo dyestuffs having the general formula: ##STR1## in which the hydroxyl group is in the 2- or 4-position relative to the azo group and wherein R 1 represents a hydrogen or halogen atom or an alkyl, cycloalkyl, aryl or alkoxy group and R 2 represents a hydrogen atom or alkyl group. The dyestuffs are useful as acid dyes for nylon.
Inventors
- 👤 Denis Robert Annesley Ridyard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:53
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/16; D06P1/18; D06P1/39; C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A process for the coloration of synthetic polyamide textile materials which comprises applying thereto an aqueous solution of a monoazo dyestuff consisting of a dye having the formula ##STR5##
Claim 2
Dependent Claim
29 words
A process for the coloration of synthetic polyamide textile materials which comprises applying thereto an aqueous solution of a monoazo dyestuff consisting of a dye having the formula ##STR5##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |