Patent US3732199A successfully refreshed from Google Patents.
US3732199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peptide synthesis
Assignee: ER Squibb and Sons LLC
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Filing: 1971-03-15
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Granted: 1973-05-08
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Expires: 1991-03-15
Abstract
Abstract IMPROVEMENT IN THE SYNTHESIS OF PEPTIDES INVOLVING THE FORMATION OF NOVEL ACTIVE INTERMEDIATES. THESE ACTIVE INTERMEDIATES ARE FORMED BY REACTION AT LOWERED TEMPERATRES OF AN IMIDYL HALIDE WITH THE TERTIARY AMMONIUM SALT OF THE ACID MOIETY OF AN AMINO ACID OR PEPTIDE. THE INTERMEDIATE THUS FORMED IS THEN REACTED WITH THE AMINO MOIETY OF THE AMINO ACID OR PEPTIDE TO BE COUPLED, THUS FORMING THE DESIRED PEPTIDE OR POLYPEPTIDE.
Inventors
- 👤 J Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:33
CPC Classifications
C; C07; C07K; C07K1/00; C07K1/04; C07K1/042; C07D; C07D499/00; C07K1/06; C07K1/08; C07K1/084; C07K5/00; C07K5/04; C07K5/06; C07K5/06086; C07K5/06095
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |