US2518644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing cellulose derivatives in the presence of inorganic thiocyanates and organic acids
Assignee: Celanese Corp
•
Filing: 1947-04-16
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Granted: 1950-08-15
•
Expires: 1967-04-16
Abstract
No abstract record available.
Inventors
- 👤 George W Seymour
- 👤 George C Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:34
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/34; D06P3/40; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
PROCESS FOR THE COLORATION OF ORGANIC DERIVATIVE OF CELLULOSE TEXTILE MATERIALS, WHICH COMPRISES MECHANICALLY IMPREGNATING SAID TEXTILE MATERIAL WITH A DYEBATH CONSISTING OF WATER, A DYESTUFF FOR SAID ORGANIC DERIVATIVE OF CELLULOSE MATERIAL, AT LEAST 20% BY WEIGHT OF A LOWER ALIPHATIC ACID, AND FROM 3 TO 10% OF A SALT OF THIOCYANIC ACID WHICH IS A SWELLING AGENT FOR THE ORGANIC DERATIVE OF CELLULOSE MATERIAL.
Claim 2
Dependent Claim
66 words
PROCESS FOR THE COLORATION OF ORGANIC DERIVATIVE OF CELLULOSE TEXTILE MATERIALS, WHICH COMPRISES MECHANICALLY IMPREGNATING SAID TEXTILE MATERIAL WITH A DYEBATH CONSISTING OF WATER, A DYESTUFF FOR SAID ORGANIC DERIVATIVE OF CELLULOSE MATERIAL, AT LEAST 20% BY WEIGHT OF A LOWER ALIPHATIC ACID, AND FROM 3 TO 10% OF A SALT OF THIOCYANIC ACID WHICH IS A SWELLING AGENT FOR THE ORGANIC DERATIVE OF CELLULOSE MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |