US2922690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs for dyeing and printing fibre mixtures which contain fibres containing acrylonitrile
Assignee: BASF SE
•
Filing: 1957-04-18
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Granted: 1960-01-26
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Expires: 1977-04-18
Abstract
No abstract record available.
Inventors
- 👤 Mueller Roland
- 👤 Eisele Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:02
CPC Classifications
C; C09; C09B; C09B11/00; C09B11/04; C09B11/26; C09B23/00; C09B23/10; C09B23/105; C09B47/00; C09B47/04; C09B47/08; C09B69/00; C09B69/02; C13; C13B; C13B30/00; C13B30/04; C13B30/08; Y; Y10; Y10S; Y10S8/00; Y10S8/903; Y10S8/905; Y10S8/908; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
A METHOD OF DYEING POLYMERIC ACRYLONITRILE-CONTAINING FIBRES AND WOOL FIBRES IN MIXED TEXTILES WHICH COMPRISES PRECIPITATING FROM AN AQUEOUS SUSPENSION A SALT OF A CATIONIC DYESTUFF AND AN ANIONIC DYESTUFF IN THE PRESENCE OF A DISPERSING AGENT, INCORPORATING SAID WATER-WETTED PRECIPITATED SALT IN A FINELY DIVIDED SUSPENSION IN AN AQUEOUS DYEBATH AND SUBJECTING THE MIXED FIBRE TEXTILE TO CONTACT WITH SAID SALT SUSPENSION AT A TEMPERATURE OF FROM 95-130*C. FOR A TIME SUFFICIENT TO COLOR THE FIBRES IN SAID TEXTILES.
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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |