Patent US3068250A successfully refreshed from Google Patents.
US3068250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
16alpha-alkyl 21-aldehyde hydrate steroids and processes for preparing the same
Assignee: Merck and Co Inc
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Filing: 1958-08-29
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Granted: 1962-12-11
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Expires: 1978-08-29
Abstract
No abstract record available.
Inventors
- 👤 Glen E Arth
- 👤 Roger E Beyler
- 👤 Lewis H Sarett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:16
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
16A - LOWER ALKYL-9A-FLUORO-17A,21,21-TRIHYDROXY-1,4PREGNADIENE-3,11,20-TRIONE.
Claim 2
Dependent Claim
4 words
16A - LOWER ALKYL-9A-FLUORO-17A,21,21-TRIHYDROXY-1,4PREGNADIENE-3,11,20-TRIONE.
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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |