US2881186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New derivatives of 7-aminocoumarin
Assignee: Novartis AG
•
Filing: 1955-10-31
•
Granted: 1959-04-07
•
Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Hausermann Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:35
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE 7-AMINOCOUMARIN DERIVATIVE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
THE 7-AMINOCOUMARIN DERIVATIVE HAVING THE GENERAL 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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |