Patent US3864371A successfully refreshed from Google Patents.
US3864371A
Expired / Lapsed
US
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Bisazomethine pigment and process for its manufacture
Assignee: Novartis Corp
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Filing: 1973-02-20
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Granted: 1975-02-04
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Expires: 1993-02-20
Abstract
Abstract A compound having the formula: IN THE PIGMENTARY FORM IN WHICH IT HAS AN ORANGE-RED COLOUR AND HAS AN X chromaticity co-ordinate of from 0.59 to 0.63 and a Y chromaticity of from 0.33 to 0.36, each as hereinbefore defined.
Inventors
- 👤 Eric Richard Inman
- 👤 James Mcgeachie Mccrae
- 👤 Christopher Midcalf
- 👤 Alison Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:03
CPC Classifications
C; C07; C07F; C07F15/00; C07F15/04; C07F15/045; C09; C09B; C09B55/00; C09B55/005; C09B55/007; C09B67/00; C09B67/0025
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
95 words
A process for the production of a compound of formula I as defined in claim 1 comprising a. reacting 2-hydroxynaphth-1-aldehyde with a water soluble nickel salt at a pH value in the range of from 7 to 9 with efficient agitation, to produce a finely divided suspension of the 1:1 nickel complex of 2-hydroxy-1-naphthaldehyde in water, and b. reacting the complex so formed with the appropriate amount of o-phenylene diamine under the same conditions, except that the reaction temperature is gradually raised to 90* - 100*C., and held in this range until reaction is complete.
Claim 4
Dependent Claim
19 words
A process as claimed in claim 2, wherein 0.1 percent of a non-ionic surfactant is present in step (a).
Claim 5
Dependent Claim
38 words
A process as claimed in claim 3 wherein said non-ionic surfactant is a condensate of nonylphenol and ehtylene oxide, said nickel salt is nickel nitrate hexahydrate, and said pH is controlled by the use of sodium acetate trihydrate.
Claim 6
Dependent Claim
22 words
A process of producing a compound of formula I as defined in claim 1 comprising a. reacting a compound having the formula:
Claim 7
Dependent Claim
19 words
A process as claimed in claim 5, wherein 0.1 percent of a non-ionic surfactant is present in step (a).
Claim 8
Dependent Claim
19 words
A process as claimed in claim 5 wheerein the pH is controlled by the use of a buffer salt.
Claim 9
Dependent Claim
14 words
A process as claimed in claim 7 wherein the buffer salt is sodium acetate.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |