Patent US4143032A successfully refreshed from Google Patents.
US4143032A
Expired / Lapsed
US
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Hexapeptides having analgesic activities
Assignee: Wyeth LLC
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Filing: 1977-06-20
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Granted: 1979-03-06
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Expires: 1997-06-20
Abstract
Abstract Hexapeptides of the formula: H-Arg-Tyr-X-Gly-Phe-Y-Z wherein X is D-Ala, D-Met, D-Leu, D-Pro, D-His, D-Trp or D-Phe; Y is D-Leu, D-Met, D-Pro or D-Lys; and Z is --OH, --NH 2 , or --NHC 2 H 2n+1 where n is 1, 2, 3, or 4 or a pharmaceutically acceptable salt thereof, exert an analgesic effect in warm-blooded animals upon intravenous administration.
Inventors
- 👤 Dimitrois Sarantakis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:41
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/665
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
The compound L-arginyl-L-tyrosyl-D-alanylglycyl-L-phenylalanyl-D-leucyl amide or a pharmaceutically acceptable salt thereof.
Claim 2
Dependent Claim
10 words
The compound L-arginyl-L-tyrosyl-D-alanylglycyl-L-phenylalanyl-D-leucyl amide or a pharmaceutically acceptable 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) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |