US3700709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azomethine pigments
Assignee: Novartis AG
•
Filing: 1970-05-20
•
Granted: 1972-10-24
•
Expires: 1990-05-20
Abstract
Abstract Copper complexes of substituted 2,2''-dihydroxyphenylnapthylazomethines are prepared by reacting the products of o-hydroxynaphthaldehydes and o-aminophenols with a coppering agent. Said compounds are pigments for organic materials.
Inventors
- 👤 Eric Richard Inman
- 👤 Ian Alexander Macpherson
- 👤 John Andrew Stirling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:58
CPC Classifications
C; C07; C07F; C07F1/00; C07F1/005; C09; C09B; C09B55/00; C09B55/002
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
17 words
The compound as claimed in claim 1 wherein X is a chlorine atom or a nitro group.
Claim 2
Dependent Claim
7 words
The copper complex compound having the formula
Claim 3
Dependent Claim
7 words
The copper complex compound having the formula
Claim 4
Dependent Claim
19 words
A process of producing a pigment comprising finely dividing a compound of formula I as defined in claim 1.
Claim 5
Dependent Claim
34 words
A process as claimed in claim 5 wherein the fine division is effected in a horizontally rotating gravity grinder, a grinder operated by a vertically rotating shaft or a grinder operated by vibratory action.
Claim 6
Dependent Claim
39 words
A process as claimed in claim 5 wherein the compound of formula I is produced by reacting an ortho-aminophenol of the formula wherein X has the same meaning as in claim 18, with an orthohydroxy aldehyde of the formula
Claim 7
Dependent Claim
55 words
A process for the production of a compound according to claim 1 in pigmentary form which comprises reacting, under aqueous conditions in the absence of an organic solvent, an alkaline solution of a compound of the formula wherein X is as defined in claim 1 with an alkaline suspension of a compound of the formula
Claim 8
Dependent Claim
20 words
A process for the production of a compound according to claim 1 which comprises reacting a compound of the formula
Claim 9
Dependent Claim
29 words
The process according to claim 8, wherein X is halogen, nitro, amido, phenylcarbamoyl, phenylsulphonyl, alkoxy of one to four carbon atoms or alkyl of one to four carbon atoms.
Claim 10
Dependent Claim
14 words
The process according to claim 10, wherein the halogen group is chlorine or bromine.
Claim 11
Dependent Claim
29 words
The process according to claim 9, wherein X is halogen, nitro, amido, phenylcarbamoyl, phenylsulphonyl, alkoxy of one to four carbon atoms or alkyl of one to four carbon atoms.
Claim 12
Dependent Claim
14 words
The process according to claim 12, wherein the halogen group is chlorine or bromine.
Claim 13
Dependent Claim
29 words
The compound according to claim 1, wherein X is halogen, nitro, amido, phenylcarbamoyl, phenylsulphonyl, alkoxy of one to four carbon atoms or alkyl of one to four carbon atoms.
Claim 14
Dependent Claim
14 words
The compound according to claim 14, wherein the halogen group is chlorine or bromine.
Claim 15
Dependent Claim
31 words
The process as claimed in claim 8 wherein the coppering agent is an aqueous cupric sulphate solution containing sufficient sodium acetate present in solution to maintain the pH value above 3.
Claim 16
Dependent Claim
18 words
The process as claimed in claim 8 wherein the coppering agent is a solution of a cuprammonium salt.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |