Patent US3145202A successfully refreshed from Google Patents.
US3145202A
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Process for the production of 19-hydroxy-delta4-3-keto steroids
Assignee: Roche Palo Alto LLC
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Filing: 1962-06-12
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Granted: 1964-08-18
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Bowers Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:36
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; A61K31/565; A61K31/568; A61K31/5685; A61K31/569; C; C07; C07J; C07J1/00; C07J5/00; C07J7/00; C07J75/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
43 words
A PROCESS FOR THE PRODUCTION OF A 19-HYDROXY-$4-3KETO STEROID, WHICH CONSISTS OF REACTING THE CORRESPONDING 3,19-DIHYDROXY-$5-STEROID, WITH AN ALUMINUM LOWER ALKOXIDE AND A LOWER ALIPHATIC KETONE IN A NON-POLAR ORGANIC SOLVENT AT REFLUX TEMPERATURE FOR AN APPROXIMATE TIME OF 5 TO 15 MINUTES.
Claim 2
Dependent Claim
43 words
A PROCESS FOR THE PRODUCTION OF A 19-HYDROXY-$4-3KETO STEROID, WHICH CONSISTS OF REACTING THE CORRESPONDING 3,19-DIHYDROXY-$5-STEROID, WITH AN ALUMINUM LOWER ALKOXIDE AND A LOWER ALIPHATIC KETONE IN A NON-POLAR ORGANIC SOLVENT AT REFLUX TEMPERATURE FOR AN APPROXIMATE TIME OF 5 TO 15 MINUTES.
Claim 3
Dependent Claim
18 words
THE PROCESS OF CLAIM 1 WHEREIN THE STARTING COMPOUND IS 19-HYDROXY DISOGENIN AND THE FINAL COMPOUND IS 19-HYDROXY-DIOSGENONE.
References Cited (Backward Citations)
US2384335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |