US3891685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azomethine copper complex dyes and process for their preparation
Assignee: Novartis Corp
•
Filing: 1972-12-12
•
Granted: 1975-06-24
•
Expires: 1992-12-12
Abstract
Abstract Copper complexes of azomethine dyestuffs of the formula WHEREIN A is R is alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, phenyl, benzyl, phenylethyl, styryl or phenylamino unsubstituted or substituted by chloro, bromo, alkyl of 1 to 4 carbon atoms, or alkoxy of 1 to 4 carbon atoms, X, Y, Z1 and Z2 is hydrogen, chloro, bromo, alkyl of 1 to 4 carbon atoms, alkoxy of 1 to 4 carbon atoms, or nitro. The dyestuffs can be used especially for pigmenting high molecular organic material.
Inventors
- 👤 Stefan Hari
- 👤 Karl Ronco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:36
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005; C09; C09B; C09B55/00; C09B55/002
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
10 words
A COPPER COMPLEX OF AN AZOMETHINE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
10 words
A COPPER COMPLEX OF AN AZOMETHINE DYESTUFF OF THE FORMULA
Claim 3
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 4
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 5
Dependent Claim
9 words
A compound according to claim 1 having the formula
Claim 6
Dependent Claim
9 words
A compound according to claim 1 having the formula
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |