US3742012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quaternary styryl dyestuffs
Assignee: Lanxess Corp
•
Filing: 1972-01-13
•
Granted: 1973-06-26
•
Expires: 1992-01-13
Abstract
Abstract WHEREIN EACH OF R1 and R2 is lower alkyl or cyanoethyl, R3 is H, methyl, methoxy or chloro, X is -O-alkylene or -NH-alkylene, R5 is lower alkyl, R6 is lower alkyl or cyclohexyl, R7 is lower alkyl or benzyl and A is an anion. Green-yellow dyes having the structure
Inventors
- 👤 D Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:57
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09B; C09B23/00; C09B23/14; C09B23/143; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/919; Y10S8/93; Y10S8/931
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
9 words
A dye according to claim 1 having the structure
Claim 2
Dependent Claim
9 words
A dye according to claim 1 having the structure
Claim 3
Dependent Claim
9 words
A dye according to claim 1 having the structure
References Cited (Backward Citations)
US3247215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |