US2874154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of 20-keto-21-iodo steroids
Assignee: Syntex SA
•
Filing: 1955-10-11
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Granted: 1959-02-17
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Expires: 1975-10-11
Abstract
No abstract record available.
Inventors
- 👤 Stork Gilbert
- 👤 Howard J Ringold
- 👤 Rosenkranz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:07
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR THE PRODUCTION OF STEROIDAL 20-KETO 21-IODO COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF PREGNENTS AND 19-NORPREGNENES COMPRISING REACTING THE CORRESPONDING 21-UNSUBSTITUTED STERIOD WITH IODINE IN THE PRESENCE OF AN INERT ORGANIC NON-KETONIC SOLVENT INCLUDING INORGANIC ALKALI.
Claim 2
Dependent Claim
39 words
A PROCESS FOR THE PRODUCTION OF STEROIDAL 20-KETO 21-IODO COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF PREGNENTS AND 19-NORPREGNENES COMPRISING REACTING THE CORRESPONDING 21-UNSUBSTITUTED STERIOD WITH IODINE IN THE PRESENCE OF AN INERT ORGANIC NON-KETONIC SOLVENT INCLUDING INORGANIC ALKALI.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |