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Patent US3048581A successfully refreshed from Google Patents.
US3048581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetals and ketals of 16, 17-dihydroxy steroids
Assignee: Olin Corp
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Filing: 1960-04-25
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Granted: 1962-08-07
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Expires: 1980-04-25
Abstract
No abstract record available.
Inventors
- 👤 Fried Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:37
CPC Classifications
C; C07; C07J; C07J71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE 16,17 CYCLIC KETALS OF KETONES AND 16,17-CYCLIC ACETALS OF ALDEHYDRES OF AT LEAST TWO CARBON ATOMS, AND STEROIDS OF THE 16A, 17A-DIHYDROXY-3,20-DIKETO*4 PREGNENE SERIES CONTAINING A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF B-HYDROXY AND KETO IN THE 11-POSITION.
Claim 2
Dependent Claim
48 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE 16,17 CYCLIC KETALS OF KETONES AND 16,17-CYCLIC ACETALS OF ALDEHYDRES OF AT LEAST TWO CARBON ATOMS, AND STEROIDS OF THE 16A, 17A-DIHYDROXY-3,20-DIKETO*4 PREGNENE SERIES CONTAINING A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF B-HYDROXY AND KETO IN THE 11-POSITION.
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) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |