Patent US3875200A successfully refreshed from Google Patents.
US3875200A
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New bis-2-azomethine pigments, process for their manufacture and their use
Assignee: Novartis Corp
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Filing: 1973-06-13
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Granted: 1975-04-01
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Expires: 1993-06-13
Abstract
Abstract Bis-azomethine pigments of the formula WHEREIN X denotes an aromatic radical on which the imino groups are in the o-position, Y denotes a hydroxyl, alkoxy, cycloalkoxy, aralkoxy or aryloxy, amino, alkylamino or arylamino group and Z denotes a H or halogen atom or an alkoxy, nitro or nitrile group, the radical X having to be free of nitro groups if Y denotes an arylamino group and Z denotes a H atom, as well as metal complexes of these bis-azomethines are useful for coloring plastics and lacquers in yellow to red shades of good fastness properties.
Inventors
- 👤 Eplattenier Francois L
- 👤 Andre Pugin
- 👤 Laurent Vuitel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; C09; C09B; C09B55/00; C09B55/005
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A BIS-AZOMETHINE PIGMENT OF THE FORMULA
Claim 2
Dependent Claim
6 words
A BIS-AZOMETHINE PIGMENT OF THE FORMULA
Claim 3
Dependent Claim
10 words
A bis-azomethine pigment according to claim 1 wherein Y is
Claim 4
Dependent Claim
9 words
The compound according to claim 1 of the formula
References Cited (Backward Citations)
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |