US3912732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dioxazine dyestuffs
Assignee: Novartis Corp
•
Filing: 1973-05-01
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Granted: 1975-10-14
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Expires: 1993-05-01
Abstract
Abstract Dioxazine dyestuffs of the formula WHEREIN THE A denote aromatic radicals, especially benzene radicals, and the X denote alkoxy, aralkoxy, aryloxy, alkylmercapto, aralkylmercapto or arylmercapto groups, and, in the case that X denotes an alkoxy group, the radicals A must be free of sulphonamide groups are valuable pigments useful for coloring lacquers and plastics in violet shades of excellent fastness properties.
Inventors
- 👤 Kurt Burdeska
- 👤 Andre Pugin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:57
CPC Classifications
C; C09; C09B; C09B19/00; C09B19/02; C07; C07C; C07C46/00; C07C50/00; C07C50/26; C07C50/28; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/88; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/38; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
6 words
A DIOXAZINE DYESTUFF OF THE FORMULA
Claim 2
Dependent Claim
6 words
A DIOXAZINE DYESTUFF OF THE FORMULA
Claim 3
Dependent Claim
13 words
A dioxazine dyestuff according to claim 1, wherein X2 denotes a O atom.
Claim 4
Dependent Claim
9 words
The compound according to claim 1 of the formula
Claim 5
Dependent Claim
9 words
The compound according to claim 1 of the formula
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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) | 1978-10-13 | 1979-04-14 | 1979-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-13 | 1983-04-14 | 1983-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-13 | 1987-04-14 | 1987-10-14 | $7700.00 | Window Closed / Lapsed |