Patent US3778427A successfully refreshed from Google Patents.
US3778427A
Expired / Lapsed
US
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Hexapeptide
Assignee: Abbott Laboratories
•
Filing: 1971-11-02
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Granted: 1973-12-11
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Expires: 1991-11-02
Abstract
Abstract THE SYNTHESIS OF THE HEXAPEPTIDE TYR-GLY-LEU-ARG-PROGLY-AMIDE CARRYING EASILY REMOVABLE PROTECTIVE GROUPS ON THE TYR AND ARG MOIETIES IS DESCIRBED; THE CORRESPONDINGLY PROTECTED PENTAPEPTIDE IS USED AS THE STARTING MATERIAL. THE HEXAPEPTIDE, UPON REMOVAL OF ANY PROTECITVE GROUP ON THE NITROGEN OF THE TYROSINE MOEITY, IS AN IMPORTANT INTERMEDIATE FOR THE PREPARATION OF THE GONADOTROPIN-RELEASING HORMONE.
Inventors
- 👤 G Flouret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:45
CPC Classifications
C; C07; C07K; C07K7/00; C07K7/04; C07K7/23; Y; Y10; Y10S; Y10S930/00; Y10S930/01; Y10S930/13
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |