US4481138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heptadecapeptide
Assignee: Eisai Co Ltd
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Filing: 1982-07-21
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Granted: 1984-11-06
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Expires: 2002-07-21
Abstract
Abstract A substance having opiate and analgesic activity is obtained from swine duodenum. The opioid substance of the present invention comprises a heptadecapeptide having the following primary amino acid structure: Tyr-Gly-Gly-Phe-Leu-Arg-Arg-Ile-Arg-Pro-Lys-Leu-Lys-Trp-Asp-Asn-Gln.
Inventors
- 👤 Shinro Tachibana
- 👤 Kengo Araki
- 👤 Shizuko Ohya
- 👤 Seiji Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:55
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/435; C07K14/665; C07K14/675; A; A61; A61P; A61P25/00; A61P25/04; A61K; A61K38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A heptadecapeptide having the following primary amino acid structure: Tyr--Gly--Gly--Phe--Leu--Arg--Arg--Ile--Arg--Pro--Lys--Leu--Lys--Trp--Asp--Asn--Gln.
Claim 2
Dependent Claim
10 words
A heptadecapeptide having the following primary amino acid structure: Tyr--Gly--Gly--Phe--Leu--Arg--Arg--Ile--Arg--Pro--Lys--Leu--Lys--Trp--Asp--Asn--Gln.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |