US3767680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersible anthraquinone dyestuffs
Assignee: Novartis AG
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Filing: 1972-02-01
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Granted: 1973-10-23
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Expires: 1992-02-01
Abstract
Abstract DYSTUFFS OF THE DISPERSE SERIES OF THE FORMULA 1-HO,4-((2-(R-OOC-O-Y-X-)PHENYL)-NH-)ANTHRAQUINONE WHEREIN X IS -SO2-NH-, -SO2-O-, -SO2- AND -S-, R IS C1-C5-ALKYL, CYCLOHEXYL, PHEENYL OR PHENYL SUBSTITUTED BY CHLORINE, BROMINE, C1-C4-ALKYL OR C1-C4ALKOXY, Y IS C1-C4-ALKYLENE, -CH2CH2-O-CH2CH2-, OR -CH2CH2CH2-O-CH2CH2CH2- AND B MAY BE SUBSTITUTED BY CHLORINE BROMINE, C1-C2-ALKYL OR C1-C2ALKOXY. THE DYESTUFFS ARE SUITED FOR DYING SYNTHETIC ORGANIC FIBERS, ESPECIALLY POLYESTER FIBERS, IN FAST BLUE SHADES OF GOOD FASTNESS.
Inventors
- 👤 P Hindermann
- 👤 H Koelliker
- 👤 A Staub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:45
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/11; C09B1/00; C09B1/16; C09B1/20; C09B1/26; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/924; Y10S8/928
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |