US3869347A
Expired / Lapsed
US
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Process for the production of new pepstatins having anti-pepsin activity
Assignee: Microbial Chemistry Research Foundation
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Filing: 1973-08-09
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Granted: 1975-03-04
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Expires: 1993-08-09
Abstract
Abstract A process for producing new pepstatins having anti-pepsin activity by cultivating a pepstatin producing strain in a nutrient medium containing assimilable carbon sources and nitrogen sources, and extracting the new pepstatins from the cultivated broth or medium.
Inventors
- 👤 Hamao Umezawa
- 👤 Tetsuji Miyano
- 👤 Kohtaro Funaishi
- 👤 Tomio Takeuchi
- 👤 Takaaki Aoyagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:57
CPC Classifications
C; C07; C07K; C07K7/00; C07K7/02; A; A61; A61K; A61K38/00; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
16 words
A PROCESS FOR THE PRODUCTION OF PEPSTATIN DERIVATIVES ACTING AS PEPSIN INHIBITORS, WHICH HAVE THE FORMULA
Claim 2
Dependent Claim
16 words
A PROCESS FOR THE PRODUCTION OF PEPSTATIN DERIVATIVES ACTING AS PEPSIN INHIBITORS, WHICH HAVE THE FORMULA
Claim 3
Dependent Claim
32 words
The process of claim 1 including the step of converting said methyl ester to an alkali metal salt or another alkyl ester thereof wherein the alkyl group contains from 2-4 carbon atoms.
References Cited (Backward Citations)
US3819486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |