US2762794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallisable polyazo dyestuffs
Assignee: Novartis AG
•
Filing: 1954-06-08
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Granted: 1956-09-11
•
Expires: 1974-06-08
Abstract
No abstract record available.
Inventors
- 👤 Durig Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:16
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/38; C09B35/44; C09B35/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
A TRISAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
8 words
A TRISAZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |