US2627449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of polyester fibers with acid leuco vat dyes
Assignee: Individual
•
Filing: 1951-03-14
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Granted: 1953-02-03
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Expires: 1971-03-14
Abstract
No abstract record available.
Inventors
- 👤 Luttringhaus Hans
- 👤 Henry R Mautner
- 👤 Alex A Arcus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:03
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/22; D06P1/225; Y; Y10; Y10S; Y10S8/00; Y10S8/908; Y10S8/912; Y10S8/913; Y10S8/914; Y10S8/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS FOR DYEING SYNTHETIC LINEAR POLYESTER FIBER MATERIAL, WHICH COMPRISES IMPREGNATING SAID MATERIAL WITH AN ACID-REACTING AQUEOUS DISPERSION OF THE LEUCO COMPOUND OF A VAT DYE, AND HEATING THE IMPREGNATED MATERIAL AT A TEMPERATURE OF 300 TO 400* F. FOR A PERIOD RANGING FROM 25 SECONDS TO 5 MINUTES, PRIOR TO DEVELOPMENT OF THE COLORATION BY OXIDATION OF THE LEUCO COMPOUND ON THE FIBER.
Claim 2
Dependent Claim
65 words
A PROCESS FOR DYEING SYNTHETIC LINEAR POLYESTER FIBER MATERIAL, WHICH COMPRISES IMPREGNATING SAID MATERIAL WITH AN ACID-REACTING AQUEOUS DISPERSION OF THE LEUCO COMPOUND OF A VAT DYE, AND HEATING THE IMPREGNATED MATERIAL AT A TEMPERATURE OF 300 TO 400* F. FOR A PERIOD RANGING FROM 25 SECONDS TO 5 MINUTES, PRIOR TO DEVELOPMENT OF THE COLORATION BY OXIDATION OF THE LEUCO COMPOUND ON THE FIBER.
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) | 1956-02-03 | 1956-08-04 | 1957-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-03 | 1960-08-04 | 1961-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-03 | 1964-08-04 | 1965-02-03 | $7700.00 | Window Closed / Lapsed |