Patent US4128541A successfully refreshed from Google Patents.
US4128541A
Expired / Lapsed
US
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Pentapeptide with morphine- like activity
Assignee: Wyeth LLC
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Filing: 1976-12-27
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Granted: 1978-12-05
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Expires: 1996-12-27
Abstract
Abstract The pentapeptide: H-Tyr-Gly-Gly-Phe-Ser-OH, or a non-toxic salt thereof, exerts an analgesic effect in rats by injection into the lateral brain ventricle.
Inventors
- 👤 Dimitrios Sarantakis
- 👤 Norman H. Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:05
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/665; C07K14/70; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A pentapeptide of the fomula: H--Tyr--Gly--Gly--Phe--Ser--OH or a non-toxic salt thereof.
Claim 2
Dependent Claim
11 words
A pentapeptide of the fomula: H--Tyr--Gly--Gly--Phe--Ser--OH or a non-toxic salt thereof.
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) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |