US3690815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing assisted by aryl esters of aryl sulfonic acids
Assignee: Novartis Corp
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Filing: 1971-03-31
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Granted: 1972-09-12
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Expires: 1991-03-31
Abstract
Abstract A TECHNIQUE IS DISCLOSED FOR COLORING HYDROPHOBIC TEXTILE FIBERS WITH A DISPERSE, ESSENTIALLY WATER INSOLUBLE, DYESTUFF IN COMBINATION WITH AN ARYLSULFONIC ESTER CARRIER.
Inventors
- 👤 Kurt A Dellian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:08
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/64; D06P1/651; D06P1/65168; D06P3/00; D06P3/34; D06P3/36; D06P3/40; D06P3/46; D06P3/48; D06P3/52; D06P3/54; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |