US2762747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 17-keto steroid by penicillium
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-10-01
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Granted: 1956-09-11
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Expires: 1973-10-01
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Murray
- 👤 Durey H Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:53
CPC Classifications
C; C12; C12P; C12P33/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911; Y10S435/933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE PRODUCTION OF A 17-KETOSTEROID, WHICH COMPRISES: GROWING A FUNGUS OF THE GENUS PENICILLIUM UNDER AEROBIC CONDITIONS, IN THE PRESENCE OF A NUTRIENT MEDIUM AND A 20-KETOSTEROID SELECTED FROM THE GROUP CONSISTING OF 20-KETOPREGNANE AND 20-KETOALLOPREGNANE COMPOUNDS AND ISOLATING AND RECRYSTALLIZING THE RESULTING 17-KETOSTEROID.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE PRODUCTION OF A 17-KETOSTEROID, WHICH COMPRISES: GROWING A FUNGUS OF THE GENUS PENICILLIUM UNDER AEROBIC CONDITIONS, IN THE PRESENCE OF A NUTRIENT MEDIUM AND A 20-KETOSTEROID SELECTED FROM THE GROUP CONSISTING OF 20-KETOPREGNANE AND 20-KETOALLOPREGNANE COMPOUNDS AND ISOLATING AND RECRYSTALLIZING THE RESULTING 17-KETOSTEROID.
References Cited (Backward Citations)
US2649401A
Cited
US2649400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |