US3739013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alpha amides
Assignee: Rottapharm SpA
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Filing: 1970-09-23
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Granted: 1973-06-12
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Expires: 1990-09-23
Abstract
Abstract COMPRISING ESTERIFYING THE (5) CARBOXYL GROUP OF GLUTAMIC ACID WITH BENZYL ALCOHOL, BENZOYLATING THE AMINO GROUP OF THE ESTER THUS OBTAINED, AMIDATING THE (1) CARBOXYL GROUP OF THE BENZOYLATED ESTER, AND DEBENZYLATING THE AMIDATED BENZOYLATED ESTER. METHOD OF PREPARING AN ALPHA-AMIDE OF THE GENERAL FORMULA: C6H5-CO-NH-CH(-CO-R)-CH2-CH2-COOH
Inventors
- 👤 G Picciola
- 👤 L Rovati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/12; C07C237/00
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |