US2646339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of cellulose derivative textile materials
Assignee: Celanese Corp
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Filing: 1950-12-27
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Granted: 1953-07-21
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Expires: 1970-12-27
Abstract
No abstract record available.
Inventors
- 👤 George C Ward
- 👤 Jr William T Haggerty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:49
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; D06P3/403; D06P1/00; D06P1/22; D06P1/44; D06P1/64; D06P1/642; D06P1/645; D06P1/651; D06P1/65106; D06P1/667; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
PROCESS FOR DYING ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS WITH A VAT DYE, WHICH COMPRISES TREATING SAID ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS WITH AN AQUEOUS DYEBATH CONTAINING A LEUCO VAT DYE, FROM ABOUT 0.1 TO 1 PARTY BY WEIGHT OF AN ALKALI METAL CARBONATE, FROM ABOUT 0.5 TO 10 PARTS BY WEIGHT OF AN ALKYLAMINE AND FROM ABOUT 3 TO 25 PARTS BY WEIGHT OF A WATER-MISCIBLE ORGANIC LIQUID CAPABLE OF SWELLING THE ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS FOR EACH 100 PARTS BY WEIGHT OF WATER AT A TEMPERATURE BETWEEN ABOUT 40 AND 60* C. FOR A PERIOD OF BETWEEN ABOUT 15 AND 30 MINUTES AND THEN AT A TEMPERATURE BETWEEN ABOUT 70 AND 90* C. FOR A PERIOD OF BETWEEN ABOUT 30 AND 90 MINUTES, AND THEN OXIDIZING THE LEUCO VAT DYE.
Claim 2
Dependent Claim
138 words
PROCESS FOR DYING ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS WITH A VAT DYE, WHICH COMPRISES TREATING SAID ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS WITH AN AQUEOUS DYEBATH CONTAINING A LEUCO VAT DYE, FROM ABOUT 0.1 TO 1 PARTY BY WEIGHT OF AN ALKALI METAL CARBONATE, FROM ABOUT 0.5 TO 10 PARTS BY WEIGHT OF AN ALKYLAMINE AND FROM ABOUT 3 TO 25 PARTS BY WEIGHT OF A WATER-MISCIBLE ORGANIC LIQUID CAPABLE OF SWELLING THE ORGANIC ACID ESTER OF CELLULOSE TEXTILE MATERIALS FOR EACH 100 PARTS BY WEIGHT OF WATER AT A TEMPERATURE BETWEEN ABOUT 40 AND 60* C. FOR A PERIOD OF BETWEEN ABOUT 15 AND 30 MINUTES AND THEN AT A TEMPERATURE BETWEEN ABOUT 70 AND 90* C. FOR A PERIOD OF BETWEEN ABOUT 30 AND 90 MINUTES, AND THEN OXIDIZING THE LEUCO VAT DYE.
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) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |