US2934532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delta 5-11, 20-diketo-pregnene 3-ketals and process
Assignee: Merck and Co Inc
•
Filing: 1956-12-31
•
Granted: 1960-04-26
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Expires: 1976-12-31
Abstract
No abstract record available.
Inventors
- 👤 Glen E Arth
- 👤 George I Poos
- 👤 Lewis H Sarett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:15
CPC Classifications
C; C07; C07J; C07J21/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE PROCESS WHICH COMPRISES REACTING $5,16-16-(ORGANIC SULFONOXY-11,20-DIKETTO-PREGNADIENE 3-KETAL WITH HYDROGEN IN THE PRESENCE OF A NOBLE METTAL HYDROGENATION CATTALYST COMPISING PALLADIUM TTO PRODUCE $5-11,20-DIKETOPREGNENE 3-KETAL. 4. $5-11,20-DIKETO-PREGNENE 3-ETTHYLENE KETAL.
Claim 2
Dependent Claim
29 words
THE PROCESS WHICH COMPRISES REACTING $5,16-16-(ORGANIC SULFONOXY-11,20-DIKETTO-PREGNADIENE 3-KETAL WITH HYDROGEN IN THE PRESENCE OF A NOBLE METTAL HYDROGENATION CATTALYST COMPISING PALLADIUM TTO PRODUCE $5-11,20-DIKETOPREGNENE 3-KETAL. 4. $5-11,20-DIKETO-PREGNENE 3-ETTHYLENE KETAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |