US3676458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
(indolymethyl) malonate compound
Assignee: Eli Lilly and Co
•
Filing: 1970-06-11
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Granted: 1972-07-11
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Expires: 1990-06-11
Abstract
Abstract 6-(Trifluoromethyl)tryptophane, useful as a non-nutritive sweetening agent and also useful in the synthesis of a corresponding pyrrolnitrin derivative; and intermediates useful in the synthesis of 6-(trifluoromethyl)tryptophane.
Inventors
- 👤 Edmund Carl Kornfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:35
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/10; C07D209/14; C07D209/18; C07D209/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2847420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |