US3928306A
Expired / Lapsed
US
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Peptides having xenopsin-like pharmacological activity
Assignee: Eisai Co Ltd
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Filing: 1974-10-22
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Granted: 1975-12-23
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Expires: 1994-10-22
Abstract
Abstract New penta- and octapeptides are provided represented by the formula: R-Arg-Pro-Trp-Ileu-Leu-OH wherein R stands for hydrogen atom or the grouping of pyrGluLys-Ileu-Leu-OH. Said peptides possess various pharmacological activities such as contracting activity on muscle of stomach fundus, depression of blood pressure and the like, and may be used in therapeutic treatments as substitute of the known octapeptide hereinafter-named ''''Xenopsin'''' obtained from natural source.
Inventors
- 👤 Mikio Uchiyama
- 👤 Shinro Tachibana
- 👤 Kengo Araki
- 👤 Takafumi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:05
CPC Classifications
C; C07; C07K; C07K7/00; C07K7/04; C07K7/06; C07K5/00; C07K5/04; C07K5/08; C07K5/0821; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
PEPTIDE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA: R-ARG-PRO-TRP-LLEU-OH WHEREIN R STANDS FOR H OR THE GROUPING OF PYRGLU-LYS-GLY.
Claim 2
Dependent Claim
18 words
PEPTIDE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA: R-ARG-PRO-TRP-LLEU-OH WHEREIN R STANDS FOR H OR THE GROUPING OF PYRGLU-LYS-GLY.
Claim 3
Dependent Claim
10 words
Pentapeptide compound claimed in claim 1 wherein R is H.
Claim 4
Dependent Claim
13 words
Octapeptide compound claimed in claim 1 wherein R is the grouping of pyrGlu-Lys-Gly.
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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |