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US2844594A
Expired / Lapsed
US
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3-aryl-7-dialkylaminocoumarins
Assignee: Wyeth Holdings LLC
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Filing: 1955-09-21
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Granted: 1958-07-22
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Expires: 1975-09-21
Abstract
No abstract record available.
Inventors
- 👤 Long Robert Sidney
- 👤 Scalera Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:28
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
5 words
COMPOUNDS REPRESENTED BY THE FORMULA:
References Cited (Backward Citations)
US2292461A
Cited
US2341009A
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US2600375A
Cited
US2610152A
Cited
US2646355A
Cited
US2654713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |