Patent US6193744B1 successfully refreshed from Google Patents.
US3713769A
Expired / Lapsed
US
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Process for the dyeing of aromatic polyamide fibres
Assignee: Novartis Corp
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Filing: 1970-12-22
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Granted: 1973-01-30
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Expires: 1990-12-22
Abstract
Abstract PROCESS FOR THE DYEING OF AROMATIC POLYAMIDE FIBRES, PARTICULARLY AROMATIC POLYAMIDE FIBRES HAVING A HIGHLY CRYSTALLINE PHYSICAL STRUCTURE WHEREIN SAID FIBRES ARE DYED WITH AN AQUEOUS DYE LIQUOR CONTAINING A CATIONIC OR DISPERSE DYE AND AT LEAST ONE COMPOUND HAVING THE FORMULA R-O-(CH2-CH(-Z)-O)N-H WHEREIN R IS PHENYL OR A CHLORO-SUBSTITUTED PHENYL GROUP, Z IS HYDROGEN OR METHYL AND N IS AN INTEGER FROM 1 TO 3, AND EACH Z BEING, INDEPENDENTLY FROM EACH OTHER, HYDROGEN OR METHYL WHEN N IS 2 OR 3, OBTAINING ON SAID FIBRES AN EXCELLENT COLOUR YIELD.
Inventors
- 👤 J Jack
- 👤 J Keenan
- 👤 W Beal
- 👤 C Hobday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:19
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/26; C; C09; C09B; C09B44/00; C09B44/10; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/6131; D06P1/6135; D06P1/62; D06P1/621; D06P1/64; D06P1/651; D06P1/65106; D06P1/65131; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924; Y10S8/925
Claims Analysis
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |