US4874844A
Expired / Lapsed
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Tripeptide with immunostimulating activity
Assignee: Ellem Industria Farmaceutica SpA
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Filing: 1987-04-06
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Granted: 1989-10-17
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Expires: 2007-04-06
Abstract
Abstract The tripeptide Arg-Lys-Glu, synthetized by conventional solution methods, and its salts display immunostimulating activity both on maturation of immature T cells and on T cell function.
Inventors
- 👤 Brunetto Brunetti
- 👤 Marco Prada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:51
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/08; C07K5/0815; C07K5/0817; A; A61; A61P; A61P37/00; A61P37/02; A61P37/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A tripeptide consisting of L-Arg (arginine), L-Lys (lysine) and L-Glu (glutamic acid) and having the following structure: Arg-Lys-Glu or a pharmaceutically acceptable salt thereof.
Claim 2
Dependent Claim
24 words
A tripeptide consisting of L-Arg (arginine), L-Lys (lysine) and L-Glu (glutamic acid) and having the following structure: Arg-Lys-Glu or a pharmaceutically acceptable salt thereof.
Claim 3
Dependent Claim
26 words
The tripeptide as in claim 1 wherein the pharmaceutically acceptable salt thereof is selected from the group consisting of the acetate, trifluoroacetate, hydrochloride and sulfate salts.
Claim 4
Dependent Claim
15 words
The tripeptide, as in claim 2, wherein the pharmaceutically acceptable salt is the acetate salt.
References Cited (Backward Citations)
US4428938A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-16 | 1993-04-17 | 1993-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-16 | 1997-04-17 | 1997-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-16 | 2001-04-17 | 2001-10-17 | $7700.00 | Window Closed / Lapsed |