Patent US4213759A successfully refreshed from Google Patents.
US4213759A
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Coloration process: mixed dyes for differential-dyeing nylon mixtures
Assignee: Imperial Chemical Industries Ltd
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Filing: 1978-11-20
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Granted: 1980-07-22
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Expires: 1998-11-20
Abstract
Abstract Differential-dyeing nylon fibres are dyed or printed with a mixture of compatible dyes selected from spcified classes of yellow, orange, red and blue disulphonated or monosulphonated/monocarboxylated monoazo, disazo and anthraquinone dyes.
Inventors
- 👤 Denis R. A. Ridyard
- 👤 Charles W. Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:19
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C09B1/34; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/241; D06P3/82; D06P3/8204; D06P3/8209
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
172 words
A process for dyeing a mixture of differential dyeing nylon fibres which comprises treating said mixture in an aqueous dyebath having a pH of 5-8 and consisting essentially of dyes selected from at least two of the following classes, the dyes being shown in the form of the free acids: (i) a yellow dye of the formula: ##STR13## (ii) orange dyes of the formula: ##STR14## (iv) red dyes of the formula: ##STR15## wherein the R 4 OCONH-- group is in the 4-- or 5-position relative to the azo group and R 4 represents an alkyl, cycloalkyl, or aralkyl radical containing from 4 to 8 carbon atoms; (v) blue dyes of the formula: ##STR16## wherein one of X and Y represents --SO 3 H and the other represents --NHCOOR 5 wherein R 5 represents an alkyl, cycloalkyl or aralkyl radical containing up to 8 carbon atoms; and (vi) blue dyes of the formula: ##STR17## wherein one of X 1 and Y 1 represents --SO 3 H and the other represents a chlorine atom.
Claim 2
Dependent Claim
172 words
A process for dyeing a mixture of differential dyeing nylon fibres which comprises treating said mixture in an aqueous dyebath having a pH of 5-8 and consisting essentially of dyes selected from at least two of the following classes, the dyes being shown in the form of the free acids: (i) a yellow dye of the formula: ##STR13## (ii) orange dyes of the formula: ##STR14## (iv) red dyes of the formula: ##STR15## wherein the R 4 OCONH-- group is in the 4-- or 5-position relative to the azo group and R 4 represents an alkyl, cycloalkyl, or aralkyl radical containing from 4 to 8 carbon atoms; (v) blue dyes of the formula: ##STR16## wherein one of X and Y represents --SO 3 H and the other represents --NHCOOR 5 wherein R 5 represents an alkyl, cycloalkyl or aralkyl radical containing up to 8 carbon atoms; and (vi) blue dyes of the formula: ##STR17## wherein one of X 1 and Y 1 represents --SO 3 H and the other represents a chlorine atom.
Claim 3
Dependent Claim
53 words
A process as claimed in claim 1 wherein the dyes are selected from at least two of the following: A yellow dye of the formula: ##STR18## an orange dye of the formula: ##STR19## a red dye of the formula: ##STR20## and a blue dye of the formula: ##STR21## or of the formula: ##STR22##
References Cited (Backward Citations)
US3725384A
Cited
US3958930A
Cited
GB1466069A
Cited
GB1482356A
Cited
GB1485438A
Cited
BE852048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-22 | 1984-01-21 | 1984-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-22 | 1988-01-21 | 1988-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-22 | 1992-01-21 | 1992-07-22 | $7700.00 | Window Closed / Lapsed |