US2929822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-substituted 7-carbalkoxyamino-coumarins
Assignee: Novartis AG
•
Filing: 1958-08-25
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Granted: 1960-03-22
•
Expires: 1978-08-25
Abstract
No abstract record available.
Inventors
- 👤 Hausermann Henrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:06
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A 7-CARBALKOXYAMINOCOUMARIN DERATIVE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
A 7-CARBALKOXYAMINOCOUMARIN DERATIVE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |