Patent US3293255A successfully refreshed from Google Patents.
US3293255A
Expired / Lapsed
US
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New substituted coumarins
Assignee: Merck Sante SAS
•
Filing: 1964-03-30
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Granted: 1966-12-20
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Molho Darius
- 👤 Boschetti Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:01
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/42; C07D311/56; C07D311/44; C07D311/46; C07D311/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
NICOTINATE OF 2(N-DIETHYLAMINO) ETHYL-3-CARBOXAMIDE-4-HYDROXY COUMARIN.
Claim 2
Dependent Claim
5 words
NICOTINATE OF 2(N-DIETHYLAMINO) ETHYL-3-CARBOXAMIDE-4-HYDROXY COUMARIN.
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) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |