US2721828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of 17-ketosteroids
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-10-01
•
Granted: 1955-10-25
•
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 16:20
CPC Classifications
C; C12; C12P; C12P33/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR THE PRODUCTION OF A 17-KETOSTEROID, WHICH COMPRISES: GROWING A FUNGUS OF THE GENUS GLIOCLADIUM UNDER AEROBIC CONDITIONS, IN THE PRESENCE OF A NUTRIENT MEDIUM AND A 20-OXYGENATED STEROID SELECTED FROM THE GROUP CONSISTING OF 20-KETOSTEROIDS AND 20-HYDROXYSTEROIDS.
Claim 2
Dependent Claim
40 words
A PROCESS FOR THE PRODUCTION OF A 17-KETOSTEROID, WHICH COMPRISES: GROWING A FUNGUS OF THE GENUS GLIOCLADIUM UNDER AEROBIC CONDITIONS, IN THE PRESENCE OF A NUTRIENT MEDIUM AND A 20-OXYGENATED STEROID SELECTED FROM THE GROUP CONSISTING OF 20-KETOSTEROIDS AND 20-HYDROXYSTEROIDS.
References Cited (Backward Citations)
US2649400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-24 | 1959-04-25 | 1959-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-24 | 1963-04-25 | 1963-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-24 | 1967-04-25 | 1967-10-25 | $7700.00 | Window Closed / Lapsed |