US3345387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 16beta-alkyl and 16beta-alkyl steroids of the pregnane series
Assignee: Merck and Co Inc
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Filing: 1964-05-25
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Granted: 1967-10-03
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Expires: 1984-05-25
Abstract
No abstract record available.
Inventors
- 👤 Taub David
- 👤 Norman L Wendler
- 👤 Harry L Slates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:15
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
THE PROCESS WHICH COMPRISES REACTING 3A-LOWER ALKANOYLOXY-16-LOWER ALKYL-16-PREGENE-11,20-DIONE WITH A PEROXIDIC OXIDIZING AGENT TO PRODUCE 16B-LOWER ALKYL16A, 17 A-EPOXY-3A-HYDROXYPREGNANE-11,20-DIONE, AND REACTING THE LATTER COMPOUND WITH HYDROGEN TO FORM 16BLOWER ALKYL-3A, 17 A-DIHYDROXY-PREGNANE-11,20-DIONE.
Claim 2
Dependent Claim
32 words
THE PROCESS WHICH COMPRISES REACTING 3A-LOWER ALKANOYLOXY-16-LOWER ALKYL-16-PREGENE-11,20-DIONE WITH A PEROXIDIC OXIDIZING AGENT TO PRODUCE 16B-LOWER ALKYL16A, 17 A-EPOXY-3A-HYDROXYPREGNANE-11,20-DIONE, AND REACTING THE LATTER COMPOUND WITH HYDROGEN TO FORM 16BLOWER ALKYL-3A, 17 A-DIHYDROXY-PREGNANE-11,20-DIONE.
References Cited (Backward Citations)
US2705233A
Cited
GB744237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |