US2769824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxylation of delta-pregnenes
Assignee: Pharmacia and Upjohn Co
•
Filing: 1954-04-26
•
Granted: 1956-11-06
•
Expires: 1974-04-26
Abstract
No abstract record available.
Inventors
- 👤 William P Schneider
- 👤 Jr A Vern Mcintosh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
C; C07; C07J; C07J13/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE HYDROXYLATION OF A 3-OXYGYNATED$17(20)-STEROID HAVING A PREGNANE CARBON SKELETON WHICH COMPRISES REACTING THE STERIOD WITH AT LEAST ONE EQUIVALENT EACH OF WATER AND A TERTIARY PREDOMINATELY NON-AROMATIC AMINE OXIDE AND LESS THAN A MOLAR EQUIVALENT OF OSMIUM TETROXIDE TO PRODUCE THE CORRESPONDING 17A.20-DIHYDROXY STERIOD.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE HYDROXYLATION OF A 3-OXYGYNATED$17(20)-STEROID HAVING A PREGNANE CARBON SKELETON WHICH COMPRISES REACTING THE STERIOD WITH AT LEAST ONE EQUIVALENT EACH OF WATER AND A TERTIARY PREDOMINATELY NON-AROMATIC AMINE OXIDE AND LESS THAN A MOLAR EQUIVALENT OF OSMIUM TETROXIDE TO PRODUCE THE CORRESPONDING 17A.20-DIHYDROXY STERIOD.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |