US2653074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of polyacrylonitrile fibers
Assignee: EIDP Inc
•
Filing: 1951-05-24
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Granted: 1953-09-22
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Expires: 1971-05-24
Abstract
No abstract record available.
Inventors
- 👤 Robert H Blaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:17
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/70; D06P3/704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS FOR DYEING A FIBER PRDUCED FROM A MATERIAL FROM THE CLASS CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS OF ACRYLONITRILE CONTAINING AT LAST 40% ACRYLONITRILE WITH A DYE FROM THE CLASS CONSISTING OF AN ACID DYE AND A DIRECT DYE WHICH COMPRISES APPLYING THE DYE IN AN AQUEOUS MEDIUM HAVING A PH OF FROM 1.5 TO 5 CONTAINING A COPPER IN AN AMOUNT SUFFICIENT TO PROVIDE 0.25 TO 3.0 WEIGHT PERCENT OF CUPROUS ION, AND FROM 0.15 TO 3.2 WEIGHT PERCENT OF HYDROXYLAMINE, BOTH BASED ON THE WEIGHT OF THE MATERIAL TO BE DYED, AND CARRYING OUT THE DYEING AT TEMPERATURES OF FROM 190* TO 250* F.
Claim 2
Dependent Claim
107 words
A PROCESS FOR DYEING A FIBER PRDUCED FROM A MATERIAL FROM THE CLASS CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS OF ACRYLONITRILE CONTAINING AT LAST 40% ACRYLONITRILE WITH A DYE FROM THE CLASS CONSISTING OF AN ACID DYE AND A DIRECT DYE WHICH COMPRISES APPLYING THE DYE IN AN AQUEOUS MEDIUM HAVING A PH OF FROM 1.5 TO 5 CONTAINING A COPPER IN AN AMOUNT SUFFICIENT TO PROVIDE 0.25 TO 3.0 WEIGHT PERCENT OF CUPROUS ION, AND FROM 0.15 TO 3.2 WEIGHT PERCENT OF HYDROXYLAMINE, BOTH BASED ON THE WEIGHT OF THE MATERIAL TO BE DYED, AND CARRYING OUT THE DYEING AT TEMPERATURES OF FROM 190* TO 250* F.
References Cited (Backward Citations)
US2148659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |