US4785114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quinophthalone dyes
Assignee: BASF SE
•
Filing: 1986-09-15
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Granted: 1988-11-15
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Expires: 2006-09-15
Abstract
Abstract Quinophthalone dyes of the formula <IMAGE> (I) where X is O or NC-C-R, where R is cyano, unsubstituted or N-substituted carbamyl, carboalkoxy, quinazolonyl, quinoxalinonyl, benzimidazolyl or benzothiazolyl and the rings A, B, the quinoline system and/or the fused benzo systems may be substituted by insolubilizing groups, in surface finishes, printing inks and plastics, in particular in thermoplastics, gives bright hues having good fastness properties coupled with high thermostability.
Inventors
- 👤 Wolfgang Lotsch
- 👤 Peter Neumann
- 👤 Heinrich Kowarsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:27
CPC Classifications
C; C09; C09B; C09B25/00; C09B57/00; C09B57/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
A quinophthalone dye of the formula ##STR136## where the rings A and B are each substituted by 4 halogens selected from the group consisting of fluorine, chlorine and bromine.
Claim 2
Dependent Claim
29 words
A quinophthalone dye of the formula ##STR136## where the rings A and B are each substituted by 4 halogens selected from the group consisting of fluorine, chlorine and bromine.
Claim 3
Dependent Claim
21 words
A quinophthalone dye as claimed in claim 1, wherein the rings A and B are each substituted by 4 chlorine atoms.
Claim 4
Dependent Claim
11 words
A dye as claimed in claim 1, of the formula ##STR137##
References Cited (Backward Citations)
JPS4830656B1
Cited
DE2041999A1
Cited
JPS4830656A
Cited
US3979386A
Cited
DE2615394A1
Cited
JPS53121822A
Cited
CA1140130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |