US3374230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetylation of steroidal alcohols with ketene
Assignee: Merck Sharp & Dohme LLC
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Filing: 1966-04-26
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Granted: 1968-03-19
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Expires: 1986-04-26
Abstract
No abstract record available.
Inventors
- 👤 John N Gardner
- 👤 Hershel L Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:25
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; C; C07; C07J; C07J1/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE PROCESS FOR ACETYLATING A TERTIARY STEROIDAL ALCOHOL WHICH COMPRISES CONTACTING SAID TERTIARY STEROIDAL ALCOHOL WITH KETENE IN A BASIC MEDIUM COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALKOXIDES, ALKALI METAL AMIDES AND ALKALI METAL HYDRIDES IN AN INERT ORGANIC SOLVENT.
Claim 2
Dependent Claim
45 words
THE PROCESS FOR ACETYLATING A TERTIARY STEROIDAL ALCOHOL WHICH COMPRISES CONTACTING SAID TERTIARY STEROIDAL ALCOHOL WITH KETENE IN A BASIC MEDIUM COMPRISING A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL ALKOXIDES, ALKALI METAL AMIDES AND ALKALI METAL HYDRIDES IN AN INERT ORGANIC SOLVENT.
References Cited (Backward Citations)
AT224277B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |