US4003886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tetracarboxylic acid ester substituted disazo pigments
Assignee: Novartis AG
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Filing: 1976-05-13
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Granted: 1977-01-18
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Expires: 1996-05-13
Abstract
Abstract A compound of the formula ##STR1## in which A represents phenylene which may be substituted by chlorine, bromine, methyl, methoxy, ethoxy or cyano, X represents hydrogen or chlorine, and R represents methyl or ethyl, was prepared. The compounds are useful for pigmenting high molecular organic materials such as polyamides, polyurethanes and polyesters. The compounds have excellent fastness to light, migration, weather and to alkali.
Inventors
- 👤 Willy Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:54
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/22; C08K5/23; C09; C09B; C09B33/00; C09B33/02; C09B33/153
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
56 words
A compound of the formula ##STR35##in which X 1 and X 2 represent hydrogen, chlorine, bromine, methyl, methoxy, ethoxy or cyano and R represents methyl or ethyl, which has been subjected to an aftertreatment, said aftertreatment consisting of heating said compound in an inert organic liquid at a temperature of from 100° C to 150° C.
Claim 2
Dependent Claim
56 words
A compound of the formula ##STR35##in which X 1 and X 2 represent hydrogen, chlorine, bromine, methyl, methoxy, ethoxy or cyano and R represents methyl or ethyl, which has been subjected to an aftertreatment, said aftertreatment consisting of heating said compound in an inert organic liquid at a temperature of from 100° C to 150° C.
Claim 3
Dependent Claim
11 words
A compound according to claim 1 in which R represents methyl.
Claim 4
Dependent Claim
62 words
The compound according to claim 1 which has been subjected to an aftertreatment said aftertreatment consisting of heating the compound in an inert organic solvent selected from the group consisting of a benzene substituted by halogen, alkyl or nitro, a pyridine base, a ketone, an ether, an amide, N-methylpyrrolidone or a sulphoxone at a temperature of from 100° C to 150° C.
References Cited (Backward Citations)
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Cited
US3169955A
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GB1066769A
Cited
US3413279A
Cited
GB1076635A
Cited
US3609135A
Cited
US3711461A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |