US4457783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized opaque form of C.I. Pigment Yellow 74
Assignee: Novartis Corp
•
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 05:59
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.
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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) | 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 |