US2636802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dyeing acrylonitrile fibers with acid dyes using zinc chloride
Assignee: Solutia Inc
•
Filing: 1949-05-20
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Granted: 1953-04-28
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Expires: 1969-05-20
Abstract
No abstract record available.
Inventors
- 👤 George L Wesp
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:59
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/67341; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A MEHTOD OF DYEING A FIBER OF A POLYMER OF A MONOMERIC COMPOSITION OF WHICH AT LEAST 80% BY WEIGHT IS ACRYLONITRILE, WHICH COMPRISES TREATING THE FIBER WITH AN AQUEOUS SOLUTION OF AT LEAST 45% ZINC CHLORIDE AT 5* TO 100*C. FOR A PEROID OF 0.5 TO 60 MINUTES, CONTACTING THE FIBER TO AN AQUEOUS DYE BATH OF AN ACID DYESTUFF, AND DRYING THE DYED FIBER.
Claim 2
Dependent Claim
66 words
A MEHTOD OF DYEING A FIBER OF A POLYMER OF A MONOMERIC COMPOSITION OF WHICH AT LEAST 80% BY WEIGHT IS ACRYLONITRILE, WHICH COMPRISES TREATING THE FIBER WITH AN AQUEOUS SOLUTION OF AT LEAST 45% ZINC CHLORIDE AT 5* TO 100*C. FOR A PEROID OF 0.5 TO 60 MINUTES, CONTACTING THE FIBER TO AN AQUEOUS DYE BATH OF AN ACID DYESTUFF, AND DRYING THE DYED FIBER.
References Cited (Backward Citations)
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Cited
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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) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |