US3936477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blue anthraquinoid disperse dyes, their production and use
Assignee: BASF SE
•
Filing: 1974-08-28
•
Granted: 1976-02-03
•
Expires: 1994-08-28
Abstract
Abstract Anthraquinoid disperse dyes of formula:
Inventors
- 👤 Karl Maier
- 👤 Ernst Hartwig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:23
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/503
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
42 words
A dye of the formula: ##SPC6## in which X is hydrogen, chloro, methyl, methoxy or ethoxy; Y is saturated alkylene of two to eight carbon atoms or --(CH 2 ) 2 --O--(CH 2 ) 2 --; and Z is --CN or --COOH.
Claim 2
Dependent Claim
42 words
A dye of the formula: ##SPC6## in which X is hydrogen, chloro, methyl, methoxy or ethoxy; Y is saturated alkylene of two to eight carbon atoms or --(CH 2 ) 2 --O--(CH 2 ) 2 --; and Z is --CN or --COOH.
Claim 3
Dependent Claim
23 words
A dye as claimed in claim 1 in which Z is --CN and X and Y have the meanings given in claim 1.
Claim 4
Dependent Claim
28 words
A dye of the formula given in claim 1 in which Y is --CH 2 --CH 2 -- or --CH 2 --CH 2 --O--(CH 2 ) 2 --.
Claim 5
Dependent Claim
6 words
A dye of the formula: ##SPC7##
Claim 6
Dependent Claim
6 words
A dye of the formula: ##SPC7##
Claim 7
Dependent Claim
6 words
A dye of the formula: ##SPC8##
Claim 8
Dependent Claim
6 words
A dye of the formula: ##SPC8##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-02 | 1979-08-04 | 1980-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-02 | 1983-08-04 | 1984-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-02 | 1987-08-04 | 1988-02-03 | $7700.00 | Window Closed / Lapsed |