US2866737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side-chain cleavage by cylindrocephalum aureum
Assignee: Pfizer Inc
•
Filing: 1957-01-23
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Granted: 1958-12-30
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Expires: 1977-01-23
Abstract
No abstract record available.
Inventors
- 👤 Gilbert M Shull
- 👤 John B Routien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:30
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 CLEAVING THE C-17 SIDE CHAIN OF A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF 21-HYDROXYPROGESTERONE, A LOWER ALKANOYL ESTER OF 21-HYDROXYPROGESTERONE AND PROGESTERONE, WHICH COMPRISES CONTACTING SAID COMPOUND IN AN AQUEOUS MEDIUM WITH A GROWING CULTURE OF AN ORGANISM OF THE SPECIES CYLINDROCEPHALUM AUREUM.
Claim 2
Dependent Claim
47 words
A PROCESS FOR CLEAVING THE C-17 SIDE CHAIN OF A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF 21-HYDROXYPROGESTERONE, A LOWER ALKANOYL ESTER OF 21-HYDROXYPROGESTERONE AND PROGESTERONE, WHICH COMPRISES CONTACTING SAID COMPOUND IN AN AQUEOUS MEDIUM WITH A GROWING CULTURE OF AN ORGANISM OF THE SPECIES CYLINDROCEPHALUM AUREUM.
References Cited (Backward Citations)
US2721828A
Cited
US2762747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |