US4311481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for improved dyeing
Assignee: Whitby Research Inc
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Filing: 1981-01-23
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Granted: 1982-01-19
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Expires: 2001-01-23
Abstract
Abstract There is disclosed a method of improvement of dyeing fibers by utilizing in the dyeing process, an effective, dye-enhancing amount of a textile auxiliary having the structural formula ##STR1## wherein R' is H or a lower alkyl group having 1-4 carbon atoms, n is O or a positive integer from 1-11 and R is an alkyl group (straight or branch chain) having 1-18 carbon atoms or aryl group, e.g., phenyl. The compounds disclosed herein enhance dye penetration of fibers and allow the dyeing process to take place at lower temperatures in less time.
Inventors
- 👤 Eric L. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:03
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/642; D06P1/649; D06P1/6495; D06P7/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
A method of enhancing dye penetration of fibers by utilizing in the dyeing process, an effective, dye-enhancing amount of 1-n-dodecylazacycloheptan-2-one.
Claim 2
Independent Claim
20 words
A method of enhancing dye penetration of fibers by utilizing in the dyeing process, an effective, dye-enhancing amount of 1-n-dodecylazacycloheptan-2-one.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the fibers are selected from the group of natural and synthetic fibers.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the fibers are synthetic fibers selected from the group consisting of rayon, acetate, polyamide, acrylic, polyester and polyolefin fibers.
References Cited (Backward Citations)
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US3096142A
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US3332938A
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US3449154A
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US3486838A
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US3963418A
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US3989816A
Cited
GB1553309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |