US2562030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 17-hydroxy 20-keto steroid compounds
Assignee: Research Corp
•
Filing: 1950-06-27
•
Granted: 1951-07-24
•
Expires: 1970-06-27
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Gallagher
- 👤 Theodore H Kritchevsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:46
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
A METHOD WHICH COMPRISES SUBJECTING AN ENOL CARBOXYLIC ACID ESTER OF A 20-KETOSTEROID TO THE ACTION OF AN ORGANIC PERACID AND SAPONIFYING THE PRODUCT TO PRODUCE THE CORRESPONDING 17HYDROXY-20-KETOSTEROID.
Claim 2
Independent Claim
29 words
A METHOD WHICH COMPRISES SUBJECTING AN ENOL CARBOXYLIC ACID ESTER OF A 20-KETOSTEROID TO THE ACTION OF AN ORGANIC PERACID AND SAPONIFYING THE PRODUCT TO PRODUCE THE CORRESPONDING 17HYDROXY-20-KETOSTEROID.
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) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |