Patent US3787176A successfully refreshed from Google Patents.
US3787176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for space-dyeing of cellulose fibers
Assignee: Hoechst AG
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Filing: 1971-11-18
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Granted: 1974-01-22
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Expires: 1991-11-18
Abstract
Abstract Process for the space-dyeing of yarn or sliver made from cellulose fibers, wherein a wound package of the said textile material is first impregnated with an aqueous liquor containing an alkaline substance and at least one component capable of entering into azo coupling, then - at least at one selected portion of the bobbin - one or several acid aqueous solutions each containing at least one diazonium compound of an aromatic amine and at least one phthalocyanine dyestuff having quaternary ammonium groups are injected, and finally the goods so treated are exposed to the action of heat for fixation of the phthalocyanine dyestuffs and for development of the azo dyestuffs.
Inventors
- 👤 Der Eltz H Von
- 👤 D Fink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:47
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/68; D06B; D06B11/00; D06P1/00; D06P1/0096; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A process as claimed in claim 1, wherein the fixation of the dyestuffs is carried out by steaming.
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |