US2905678A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6beta-hydroxy-delta4-pregnenes
Assignee: Merck and Co Inc
•
Filing: 1953-11-16
•
Granted: 1959-09-22
•
Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Lewis H Sarett
- 👤 Constantin James
- 👤 Glen E Arth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
6B-HYDROXY-3,11,20-TRIKETO$4-PREGENE HAVING IN THE 17-POSITION A SUBSTITUENT OF THE GROUP CONSISTING OF A-HYDROGEN AND A-HYDROXY AND IN THE 21-POSITION A SUBSTITUENT OF THE GROUP CONSISTING OF METHYL AND ESTERIFIED METHYLOL GROUPS, AT LEAST ONE SUBSTITUENT IN THE 17 AND 21 POSITIONS BEING AN OXYGEN CONTAINING GROUP. 35. 6B,11B.17A-TRIHYDROXY - 3,20 - DIKETO - $4 - PREGNENE HAVING IN THE 21 -POSITION A MEMBER OF THE GROUP CONSISTING OF METHYL, METHYLOL AND
Claim 2
Dependent Claim
71 words
6B-HYDROXY-3,11,20-TRIKETO$4-PREGENE HAVING IN THE 17-POSITION A SUBSTITUENT OF THE GROUP CONSISTING OF A-HYDROGEN AND A-HYDROXY AND IN THE 21-POSITION A SUBSTITUENT OF THE GROUP CONSISTING OF METHYL AND ESTERIFIED METHYLOL GROUPS, AT LEAST ONE SUBSTITUENT IN THE 17 AND 21 POSITIONS BEING AN OXYGEN CONTAINING GROUP. 35. 6B,11B.17A-TRIHYDROXY - 3,20 - DIKETO - $4 - PREGNENE HAVING IN THE 21 -POSITION A MEMBER OF THE GROUP CONSISTING OF METHYL, METHYLOL AND
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |