Patent US2879279A successfully refreshed from Google Patents.
US2879279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of unsaturated compounds of the cyclopentanopolyhydrophenanthrene series
Assignee: Organon NV
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Filing: 1957-09-24
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Granted: 1959-03-24
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Expires: 1977-09-24
Abstract
No abstract record available.
Inventors
- 👤 Burg Willem Jacob Van Der
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:28
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A PROCESS WHICH COMPRISES REACTING A 3-KETO COMPOUND SELECTED FROM THE GROUP CONSISTING OF STEROIDS OF ANDROSTANE AND PREGNANE SERIES, WHICH COMPOUND IS SATURATED IN AT LEAST ONE OF THE POSITIONS 1-2 AND 4-5, WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERIODIC ACID AND IODIC ACID TO EFFECT THE INTRODUCTION OF AT LEAST ONE DOUBLE BOND IN A-POSITION RELATIVE TO SAID 3-KETO GROUP.
Claim 2
Dependent Claim
65 words
A PROCESS WHICH COMPRISES REACTING A 3-KETO COMPOUND SELECTED FROM THE GROUP CONSISTING OF STEROIDS OF ANDROSTANE AND PREGNANE SERIES, WHICH COMPOUND IS SATURATED IN AT LEAST ONE OF THE POSITIONS 1-2 AND 4-5, WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF PERIODIC ACID AND IODIC ACID TO EFFECT THE INTRODUCTION OF AT LEAST ONE DOUBLE BOND IN A-POSITION RELATIVE TO SAID 3-KETO GROUP.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |