US2694078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization
Assignee: Pharmacia and Upjohn Co
•
Filing: 1952-02-19
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Granted: 1954-11-09
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Expires: 1972-02-19
Abstract
No abstract record available.
Inventors
- 👤 Arnold C Ott
- 👤 Jr George Slomp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:03
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS FOR THE PRODUCTION OF A $17(20)-STEROID20-ACYLATE WHICH INCLUDES THE STEP OF MIXING A $20STEROID-20-ACYLATE WHICH HAS A PREGNANE CARBON SKELETON WHEREIN THE SOLE SUBSTITUTION OTHER THAN CARBON AT CARBON ATOMS 17 AND 21 IS HYDROGEN, WITH AN ACID CATALYST IN THE PRESENCE OF AN ANHYDROUS ACIDIC IONIC MEDIUM TO PRODUCE A $17(20)-STEROID-20-ACYLATE.
Claim 2
Dependent Claim
54 words
A PROCESS FOR THE PRODUCTION OF A $17(20)-STEROID20-ACYLATE WHICH INCLUDES THE STEP OF MIXING A $20STEROID-20-ACYLATE WHICH HAS A PREGNANE CARBON SKELETON WHEREIN THE SOLE SUBSTITUTION OTHER THAN CARBON AT CARBON ATOMS 17 AND 21 IS HYDROGEN, WITH AN ACID CATALYST IN THE PRESENCE OF AN ANHYDROUS ACIDIC IONIC MEDIUM TO PRODUCE A $17(20)-STEROID-20-ACYLATE.
References Cited (Backward Citations)
FR860323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |