Patent US2773078A successfully refreshed from Google Patents.
US2773078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of glyoxyl steroids
Assignee: Merck and Co Inc
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Filing: 1953-06-16
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Granted: 1956-12-04
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Expires: 1973-06-16
Abstract
No abstract record available.
Inventors
- 👤 Weijlard John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:43
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
35 words
A PROCESS WHICH COMPRISES REACTING $4-PREGNENE17A,21-DIOL-3,11,20-TRIONE WITH AIR IN THE PRESENCE OF AN OXIDATION CATALYST SELECTED FROM THE GROUP CONSISTING OF ALCOHOL-SOLUBLE IRON SALT OXIDATION CATALYSTS AND ALCOHOLSOLUBLE COPPER SALT OXIDATION CATALYSTS TO FORM $4PREGNENE-17A-OL-21-AL-3,11,20-TRIONE.
References Cited (Backward Citations)
US2322809A
Cited
US2275790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |