Patent US2686707A successfully refreshed from Google Patents.
US2686707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vat dyeing of cellulose acetate
Assignee: Acordis UK Ltd
•
Filing: 1951-04-14
•
Granted: 1954-08-17
•
Expires: 1971-04-14
Abstract
No abstract record available.
Inventors
- 👤 Olpin Henry Charles
- 👤 Jackson Tom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:17
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; D06P3/403
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
PROCESS FOR THE COLOURATION OF TEXTILE MATERIAL COMPRISING FIBRES OF CELLULOSE ACETATE, WHICH COMPRISES IMPREGNATING THE MATERIAL WITH AN AQUEOUS PREPARATION CONTAINING AN UNREDUCED VATDYE, A THIOCYANATE, SODIUM FORMALDEHYDE SULPHOXYLATE, MONOETHANOLAMINE AND AN ALKALI METAL CARBONATE, THE PREPARATION CONTAINING AT LEAST 4% OF THE MONOETHANOLAMINE AND THE SUM OF THE PERCENTAGE OF MONOETHANOLAMINE AND THREE TIMES THE PERCENTAGE OF ALKALI METAL CARBONATE BEING FROM 10 TO 25, AND THEREAFTER DRYING AND STEAMING THE MATERIAL AND SUBJECTING IT TO OXIDATION TO REOXIDISE TO THE PARENT VAT DYE THE LEUCO COMPOUND THEREOF PRODUCED AND FIXED ON THE MATERIAL BY THE STEAMING.
Claim 2
Dependent Claim
99 words
PROCESS FOR THE COLOURATION OF TEXTILE MATERIAL COMPRISING FIBRES OF CELLULOSE ACETATE, WHICH COMPRISES IMPREGNATING THE MATERIAL WITH AN AQUEOUS PREPARATION CONTAINING AN UNREDUCED VATDYE, A THIOCYANATE, SODIUM FORMALDEHYDE SULPHOXYLATE, MONOETHANOLAMINE AND AN ALKALI METAL CARBONATE, THE PREPARATION CONTAINING AT LEAST 4% OF THE MONOETHANOLAMINE AND THE SUM OF THE PERCENTAGE OF MONOETHANOLAMINE AND THREE TIMES THE PERCENTAGE OF ALKALI METAL CARBONATE BEING FROM 10 TO 25, AND THEREAFTER DRYING AND STEAMING THE MATERIAL AND SUBJECTING IT TO OXIDATION TO REOXIDISE TO THE PARENT VAT DYE THE LEUCO COMPOUND THEREOF PRODUCED AND FIXED ON THE MATERIAL BY THE 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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |