Patent US2799690A successfully refreshed from Google Patents.
US2799690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-keto-16alpha, 20beta-dihydroxy pregnenes
Assignee: Olin Corp
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Filing: 1956-04-11
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Granted: 1957-07-16
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Expires: 1976-04-11
Abstract
No abstract record available.
Inventors
- 👤 Fried Josef
- 👤 Richard W Thoma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:14
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF $4-PREGNENE-16A,20B-FIOL-3-ONE AND,$1,4-PREGANDIENE-16A, 20B-DIOL-3-ONE.
Claim 2
Dependent Claim
11 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF $4-PREGNENE-16A,20B-FIOL-3-ONE AND,$1,4-PREGANDIENE-16A, 20B-DIOL-3-ONE.
References Cited (Backward Citations)
CH215286A
Cited
US2265143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |