US3685952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coloration of polyester textile fibers with azo dyes
Assignee: American Aniline Products Inc
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Filing: 1971-08-26
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Granted: 1972-08-22
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Expires: 1991-08-26
Abstract
Abstract POLYESTER FABRIC IS DYED WITH AZO DYES MADE BY COUPLING AN APPROPRIATE DIAZOTIZED AMINOBENZENE INTO AN A-(NALKYLANILINO)-M-TOLUENE-SULFONAMIDE, TYPIFIED BY A-(NETHYLANILINO)-M-TOLUENE-SULFONAMIDE. THIS CLASS OF AZO DYES, WHEN APPROPRIATELY DISPERSED, PRODUCES DYEINGS ON AROMATIC POLYESTER FABRICS WITH EXCELLENT SUBSTANTIVITY, OUTSTANDING SUBLIMATION FASTNESS, AND GOOD FASTNESS TO LIGHT. THE DYES ARE APPLIED TO POLYESTERS, SUCH AS POLYETHYLENE TEREPTHALATE, BY CARRIER DYEING, PRESSURE DYEING AND THERMOFIXATION METHODS.
Inventors
- 👤 Edgar Earl Renfrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:07
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; D; D06; D06P; D06P3/00; D06P3/34; D06P3/52; Y; Y10; Y10S; Y10S8/00; Y10S8/933; Y10S8/934
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |