Patent US2124124A successfully refreshed from Google Patents.
Patent US4457783A successfully refreshed from Google Patents.
US4457783A
Expired / Lapsed
US
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Stabilized opaque form of C.I. Pigment Yellow 74
Assignee: Novartis Corp
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Filing: 1982-10-20
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Granted: 1984-07-03
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Expires: 2002-10-20
Abstract
Abstract A stabilized opaque form of C.I. Pigment Yellow 74 comprises a mixture of (a) 99.0 to 80.0 wt. % of Color Index Pigment Yellow 74; and (b) 1.0 to 20.0 wt. % of a different monoazo yellow pigment based on acetoacet-2-anisidide. These pigment products are distinguished by improved storage stability when incorporated into applicational media.
Inventors
- 👤 Alexander Hamilton
- 👤 Alexander H. MacLennan
- 👤 Christopher Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:42
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0033; C09B67/0046; C09B67/0051
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A stabilized opaque form of C.I. Pigment Yellow 74 consisting essentially of (a) 99.0 to 80.0 weight % of C.I. Pigment Yellow 74; and (b) 1.0 to 20.0 weight % of a monoazo yellow pigment produced by coupling the diazo component derived from one or more of 4-nitro-2-aminoanisole, 4-methyl-2-nitroaniline or 2-methyl-5-nitroaniline with acetoacet-2-anisidide.
Claim 2
Dependent Claim
53 words
A stabilized opaque form of C.I. Pigment Yellow 74 consisting essentially of (a) 99.0 to 80.0 weight % of C.I. Pigment Yellow 74; and (b) 1.0 to 20.0 weight % of a monoazo yellow pigment produced by coupling the diazo component derived from one or more of 4-nitro-2-aminoanisole, 4-methyl-2-nitroaniline or 2-methyl-5-nitroaniline with acetoacet-2-anisidide.
Claim 3
Dependent Claim
31 words
A stabilized pigment according to claim 1 wherein the proportion of component (a) is from 97.5 to 92.5 wt. % and that of component (b) is from 2.5 to 7.5 wt.%.
Claim 4
Dependent Claim
39 words
A process of producing a stabilized opaque form of C.I. Pigment Yellow 74 as defined in claim 1 comprising forming a mixture of components (a) and (b), as defined in claim 1, in the proportions defined in claim 1.
Claim 5
Dependent Claim
27 words
An aqueous pigment paste comprising the stabilized opaque form of C.I. Pigment Yellow 74 as defined in claim 1; one or more conventional paste adjuvants; and water.
References Cited (Backward Citations)
GB537070A
Cited
GB557415A
Cited
CH247985A
Cited
GB1046108A
Cited
GB1058017A
Cited
GB1348509A
Cited
US3725101A
Cited
GB1356254A
Cited
GB1425522A
Cited
GB1428633A
Cited
GB1578988A
Cited
GB2000172A
Cited
US4251441A
Cited
EP0012944A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |