US2695832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of acrylic fibers with vat dyestuffs
Assignee: GAF Chemicals Corp
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Filing: 1951-08-24
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Granted: 1954-11-30
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Expires: 1971-08-24
Abstract
No abstract record available.
Inventors
- 👤 Henry R Mautner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:49
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/225; Y; Y10; Y10S; Y10S8/00; Y10S8/908; Y10S8/91; Y10S8/911; Y10S8/92; Y10S8/927; Y10S8/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR DYEING FIBROUS MATERIALS WHICH COMPRISES IMPREGNATING SAID MATERIAL, THE FIBER CONTENT OF WHICH IS COMPOSED OF AT LEAST 85 PER CENT BY WEIGHT OF POLYACRYLONITRILE, WITH AN ACID REACTING AQUEOUS DISPERSION OF A PH OF 2 TO 5 OF THE LEUCO COMPOUND OF A VAT DYE AND SUBJECTING THE IMPREGNATED MATERIAL TO DRY HEAT AT A TEMPERATURE OF ABOUT 300 TO 400* F. FOR A PERIOD RANGING FROM ABOUT TEN SECONDS TO TWO MINUTES.
Claim 2
Dependent Claim
77 words
A PROCESS FOR DYEING FIBROUS MATERIALS WHICH COMPRISES IMPREGNATING SAID MATERIAL, THE FIBER CONTENT OF WHICH IS COMPOSED OF AT LEAST 85 PER CENT BY WEIGHT OF POLYACRYLONITRILE, WITH AN ACID REACTING AQUEOUS DISPERSION OF A PH OF 2 TO 5 OF THE LEUCO COMPOUND OF A VAT DYE AND SUBJECTING THE IMPREGNATED MATERIAL TO DRY HEAT AT A TEMPERATURE OF ABOUT 300 TO 400* F. FOR A PERIOD RANGING FROM ABOUT TEN SECONDS TO TWO MINUTES.
References Cited (Backward Citations)
US1900172A
Cited
US2080254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |