US3578653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazonaphthotriazostilbene dyestuffs
Assignee: Individual
•
Filing: 1967-12-18
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Granted: 1971-05-11
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Expires: 1987-12-18
Abstract
Abstract A MONOAZONAPHTHOTRIAZOLOSTILBENE DYESTUFF, ESPECIALLY USEFUL FOR DYEING PAPER, HAVING IN FREE ACID FORM THE FORMULA 1-((2-(HO3S-),4-(R1-CO-CH(-CO-R2)-N=N-)PHENYL)-CH=CH-), 2-(HO3S-),4-((HO3S-)N-2H-NAPHTHO(1,2-D)TRIAZOL-2-YL)- BENZENE WHERE N HAS A VALUE OF 1 OR 2, R1 IS ALKYL OR PLHENYL, R2 IS R6, ALKOXY OR PHENOXY, OR R1 AND R2 JOINTLY REPRESENT -NHCONH-. USE OF THESE DYES RESULTS IN DYEINGS HAVING BRIGHT, PURE AND STRONG REDDISH TO GREENISHYELLOW SHADES WITH GOOD FASTNESS PROPERTIES.
Inventors
- 👤 William E Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:26
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/06; Y; Y10; Y10S; Y10S534/00; Y10S534/02
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |