Patent US2944070A successfully refreshed from Google Patents.
US2944070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 16alpha-lower alkyl steroids
Assignee: Merck and Co Inc
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Filing: 1958-09-08
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Granted: 1960-07-05
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Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 Kollonitsch Janos
- 👤 Roger J Tull
- 👤 Leonard M Weinstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:28
CPC Classifications
C; C07; C07J; C07J7/00; C07J5/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/872
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS WHICH COMPRISES INTIMATELY CONTACTING A $16-20-KETO STEROID OF THE PREGNANE AND ALLOPREGNANE SERIES WITH A METAL DI LOWER ALKYL OF THE FORMULA (R)2M WHEREIN R REPRESENTS A LOWER ALKYL AND M REPRESENTS IN METAL FROM THE GROUP CONSISTI NG OF ZINC AND CADMIUM IN THE PRESENCE OF MAGNESIUM AND COPPER HALIDES WHEREIN THE HALOGEN HAS AN ATOMIC WEIGHT GREATER THAN 35 TO PRODUCE THE CORRESPONDING 16A-LOWER ALKYL ENOL DERIVATIVE.
Claim 2
Dependent Claim
71 words
A PROCESS WHICH COMPRISES INTIMATELY CONTACTING A $16-20-KETO STEROID OF THE PREGNANE AND ALLOPREGNANE SERIES WITH A METAL DI LOWER ALKYL OF THE FORMULA (R)2M WHEREIN R REPRESENTS A LOWER ALKYL AND M REPRESENTS IN METAL FROM THE GROUP CONSISTI NG OF ZINC AND CADMIUM IN THE PRESENCE OF MAGNESIUM AND COPPER HALIDES WHEREIN THE HALOGEN HAS AN ATOMIC WEIGHT GREATER THAN 35 TO PRODUCE THE CORRESPONDING 16A-LOWER ALKYL ENOL DERIVATIVE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |