US2658023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygenation of steroids
Assignee: Pfizer Inc
•
Filing: 1953-04-21
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Granted: 1953-11-03
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Expires: 1973-04-21
Abstract
No abstract record available.
Inventors
- 👤 Gilbert M Shull
- 👤 Donald A Kita
- 👤 Jacob W Davisson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:48
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
27 words
A PROCESS FOR THE 11-B-HYDROXYLATION OF A STEROID COMPOUND, WHICH COMPRISES CONTACTING SAID STEROID COMPOUND WITH THE OXYGENATING ACTIVITY OF AN ORGANISM CHOSEN FROM THE GENUS CURVULARIA.
Claim 2
Dependent Claim
27 words
A PROCESS FOR THE 11-B-HYDROXYLATION OF A STEROID COMPOUND, WHICH COMPRISES CONTACTING SAID STEROID COMPOUND WITH THE OXYGENATING ACTIVITY OF AN ORGANISM CHOSEN FROM THE GENUS CURVULARIA.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |