US3780015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing lysine containing peptides
Assignee: Merck and Co Inc
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Filing: 1971-12-30
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Granted: 1973-12-18
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Expires: 1991-12-30
Abstract
Abstract A PROCESS FOR PREPARING PEPTIDES CONTAINING LYSINE WHEREIN THE TERMINAL AMINO GROUP OF LYSINE IS PROTECTED BY A PYRIDYL -4- METHYLOXYCARBONYL GROUP DURING FORMATION OF THE PEPTIDE AND REMOVING THIS GROUP WITH ZINC IN ACID.
Inventors
- 👤 R Hirschmann
- 👤 D Veber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:46
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/28; C07D213/30; C07C; C07C247/00; C07K; C07K1/00; C07K1/06; C07K1/061; C07K1/064
Claims Analysis
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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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |