US3795667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel peptide intermediates in the preparation of secretin
Assignee: ER Squibb and Sons LLC
•
Filing: 1970-09-30
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Granted: 1974-03-05
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Expires: 1990-09-30
Abstract
Abstract THIS INVENTION RELATES TO NOVEL INTERMEDIATES TO BE EMPLOYED IN THE PREPARATION OF THEGASTROINTESTINAL HORMONE, SECRETIN. MORE PARTICULARLY, THIS INVENTION RELATES TO COMPOUNDS OF THE FORMULA X-L-HISTIDYL-L-SERYL-L-ASPARTYLGLYCYL HYDRAZIDE WHEREIN X IS AN N-TERMINAL AMINO PROTECTING GROUP, TO INTERMEDIATES IN THE PREPARATION OF THESE COMPOUNDS, AND TO SALTS OF SUCH INTERMEDIATES.
Inventors
- 👤 M Ondetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:48
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/10; 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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |