Patent US2468912A successfully refreshed from Google Patents.
US2468912A
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Alkyl esters of alpha-acyl, alpha-acylamino, beta(3-indole)-propionic acid
Assignee: Winthrop Stearns Inc
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Filing: 1948-08-17
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Granted: 1949-05-03
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Expires: 1968-08-17
Abstract
No abstract record available.
Inventors
- 👤 Noel F Albertson
- 👤 Archer Sydney
- 👤 Chester M Suter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:25
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/18; C07D209/20
Claims Analysis
Total Claims: 0
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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) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |