US3840513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Therapeutically useful compound,leupeptins,and processes for the preparation thereof
Assignee: Microbial Chemistry Research Foundation
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Filing: 1972-06-15
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Granted: 1974-10-08
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Expires: 1992-06-15
Abstract
Abstract 1. A COMPOUND HAVING THE STRUCTURAL FORMULA: R3-CO-NH-CH(-R2)-CO-NH-CH(-R3)-CO-NH-CH(-CO-H)-(CH2)3-NH- C(-NH2)=NH WHEREIN: R1=R2= -CH2-CH(-CH3)2 AND R3=-CH3 OR -CH2-CH3 OR AN ACID ADDITION SALT THEREOF.
Inventors
- 👤 H Umezawa
- 👤 T Aoyagi
- 👤 T Takeuchi
- 👤 T Hara
- 👤 K Maeda
- 👤 M Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:38
CPC Classifications
C; C07; C07K; C07K5/00; C07K5/04; C07K5/06; C07K5/06008; C07K5/06017; C07K5/06034; C07K5/06043; C07K14/00; C07K14/81; C07K14/8107; C07K14/8139; C12; C12P; C12P21/00; C12P21/02; A; A61; A61K; A61K38/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE STRUCTURAL FORMULA:
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |