Patent US2936304A successfully refreshed from Google Patents.
US2936304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metalliferous azo dyestuffs
Assignee: Sandoz AG
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Filing: 1956-12-17
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Granted: 1960-05-10
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 Neier Reinhard
- 👤 Wehrli Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:18
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
A METALLIFEROUS AZO DYESTUFF WHICH CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
9 words
A METALLIFEROUS AZO 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) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |