US3767639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of secretin
Assignee: ER Squibb and Sons LLC
•
Filing: 1970-04-17
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Granted: 1973-10-23
•
Expires: 1990-04-17
Abstract
Abstract THE GASTROINTESTINAL HORMONE SECRETIN IS PREPARED BY FRAGMENT CONDENSATION. THE TETRAPEPTIDE L-THR-L-PHE-LTHR-L-SER IS COUPLED TO THE C-TERMINAL NONADECAPEPTIDE OF THE HORMONE, AND THE TETRAPEPTIDE L-HIS-L-SER-BBENZYL-L-ASP-GLY IS COUPLED TO THE TRICOSAPEPTIDE RESULTING FROM THE FIRST COUPLING.
Inventors
- 👤 M Bodanszky
- 👤 V Narayanan
- 👤 S Levine
- 👤 M Ondetti
- 👤 Saltza M Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:43
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/10; C07K5/1002; C07K5/1005; C07K14/00; C07K14/435; C07K14/575; C07K14/645; C07K5/1024
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |