US2760975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds for synthesizing steroids
Assignee: Monsanto Chemicals Ltd
•
Filing: 1953-03-30
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Granted: 1956-08-28
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Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 William S Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:36
CPC Classifications
C; C07; C07J; C07J73/00; C07J73/001; C07J73/003; C07C; C07C51/00; C07C51/097; C07C59/00; C07C59/40; C07C59/76; C07C59/80; C07C59/82; C07D; C07D311/00; C07D311/02; C07D311/78; C07J63/00; C07J63/008; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/22; C07C2603/26; C07C2603/40; C07C2603/42; C07C2603/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE PROCESS WHICH COMPRISES (A) REACTING 1,8A-DIMETHYL-$6,10A(1)-DECAHYDROHENANTHREN-2-ONE WITH ETHYL FORMATE IN THE PRESENCE OF SODIUM METHYLATE, (B) REACTING THE 1,8A-DIMETHYL-3-(HYDROXY) METHYLENE-$6,10A(1)-DECAHYDROPHENANTHRENE-2-ONE SO OBTAINED WITH N-METHYLANILINE, (C) REACTING THE 1,8A-DIMETHYL-3-(N-METHYLANILINO METHYLENE-$6,10A(1) - DECAHYDROPHENANTHREN-2-ONE SO OBTAINED WITH ACRYLONITRILE UNDER ALKALINE CONDITIONS AND (D) CONVERTING THE ADDUCT SO OBTAINED BY VIGOROUS ALKALINE HYDROLYSIS TO 1,8A-DIMETHYL-1-(B-CARBOXYETHYL)$6,10-DECAHYDROPHENANTHREN-2-ONE.
Claim 2
Dependent Claim
52 words
THE PROCESS WHICH COMPRISES (A) REACTING 1,8A-DIMETHYL-$6,10A(1)-DECAHYDROHENANTHREN-2-ONE WITH ETHYL FORMATE IN THE PRESENCE OF SODIUM METHYLATE, (B) REACTING THE 1,8A-DIMETHYL-3-(HYDROXY) METHYLENE-$6,10A(1)-DECAHYDROPHENANTHRENE-2-ONE SO OBTAINED WITH N-METHYLANILINE, (C) REACTING THE 1,8A-DIMETHYL-3-(N-METHYLANILINO METHYLENE-$6,10A(1) - DECAHYDROPHENANTHREN-2-ONE SO OBTAINED WITH ACRYLONITRILE UNDER ALKALINE CONDITIONS AND (D) CONVERTING THE ADDUCT SO OBTAINED BY VIGOROUS ALKALINE HYDROLYSIS TO 1,8A-DIMETHYL-1-(B-CARBOXYETHYL)$6,10-DECAHYDROPHENANTHREN-2-ONE.
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) | 1959-08-28 | 1960-02-27 | 1960-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-28 | 1964-02-27 | 1964-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-28 | 1968-02-27 | 1968-08-28 | $7700.00 | Window Closed / Lapsed |