Patent US3740319A successfully refreshed from Google Patents.
US3740319A
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US
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Biologically active substance,pepstatin and production processes thereof
Assignee: Microbial Chemistry Research Foundation
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Filing: 1970-05-14
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Granted: 1973-06-19
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Expires: 1990-05-14
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF PEPSTATIN HAVING THE FOLLOWING STRUCTURE: CH3-CH(-CH3)-CH2-CO-NH-CH(-CH(-CH3)2)-CO-NH-CH(-CH(-CH3)2)CO-NH-CH(-CH2-CH( -CH3)2)-CH(-OH)-CH2-CO-NH-CH(-CH3)CO-NH-CH(-CH2-CH(-CH3)2)-CH(-OH)-CH2-COOH WHICH COMPRISES CULTVATING A STRAIN OR STREPTOMYCES PRODUCNG PEPSTATIN IN A NUTRIENT MEDIUM UNDER AEROBIC CONDITION UNTIL SUBSTANTIAL ACTIVITY TO INHIBIT PEPSIN IS IMPARTED TO SAID CULTURED MEDIUM AND RECOVERING SAID PEPSTATIN FROM SAID CULTURED MEDIUM.
Inventors
- 👤 H Umezawa
- 👤 T Takeuchi
- 👤 T Aoyagi
- 👤 M Hamada
- 👤 Y Okami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:05
CPC Classifications
C; C07; C07K; C07K14/00; C07K14/81; C07K14/8107; C07K14/8142; C07K7/00; C07K7/02; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 0
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |