Patent US3978038A successfully refreshed from Google Patents.
US3978038A
Expired / Lapsed
US
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Disazo pigments containing at least one nitro group on the diazo component
Assignee: Novartis Corp
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Filing: 1974-02-27
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Granted: 1976-08-31
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Expires: 1994-02-27
Abstract
Abstract New disazo pigments of the formula ##SPC1## R being hydrogen, halogen, alkyl, alkoxy, nitrile, trifluormethyl, aryloxy, phenylsulfonyl or benzoyl, m and n 1 or 2, X hydrogen, halogen, alkyl, alkoxy, nitro, nitrile, trifluormethyl or carboxylic acid ester are prepared. The compounds are useful for pigmenting high molecular weight organic materials such as polyamides, polyurethanes and polyesters.
Inventors
- 👤 Georg Cseh
- 👤 Armand Roueche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:52
CPC Classifications
C; C09; C09B; C09B33/00; C09B33/02; C09B33/153; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31826; Y10T428/31855
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
Disazo pigment of the formula ##SPC17##
Claim 2
Dependent Claim
6 words
Disazo pigment of the formula ##SPC17##
Claim 3
Dependent Claim
6 words
Disazo pigment of the formula ##SPC18##
Claim 4
Dependent Claim
6 words
Disazo pigment of the formula ##SPC18##
References Cited (Backward Citations)
US1505568A
Cited
US1933431A
Cited
US2009397A
Cited
US2153539A
Cited
US2591470A
Cited
US2676958A
Cited
US3413279A
Cited
US3513154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |