US2848370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11-beta-hydroxylation of steroids with pycnosporium
Assignee: Pfizer Inc
•
Filing: 1953-05-29
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Granted: 1958-08-19
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Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Jacob W Davisson
- 👤 Donald A Kita
- 👤 John B Routten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
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
47 words
A PROCESS FOR THE 11-B-HYDROXYLATION OF A STERIOD COMPOUND HAVING A METHYLENE GROUP AT THE 11-POSITION, WHICH COMPRISES CONTACTING SAID STERIOD COMPOUND WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF A LIVING CULTURE OF THE MICROORGANISM PYCNOSPORIUM SP. ATCC 12,231 AND THE MYCELIUM OF SAID MICROORGANISM.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE 11-B-HYDROXYLATION OF A STERIOD COMPOUND HAVING A METHYLENE GROUP AT THE 11-POSITION, WHICH COMPRISES CONTACTING SAID STERIOD COMPOUND WITH A MATERIAL SELECTED FROM THE CLASS CONSISTING OF A LIVING CULTURE OF THE MICROORGANISM PYCNOSPORIUM SP. ATCC 12,231 AND THE MYCELIUM OF SAID MICROORGANISM.
References Cited (Backward Citations)
US2649402A
Cited
US2649400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |