Patent US2671084A successfully refreshed from Google Patents.
US2671084A
Expired / Lapsed
US
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17(20)-oxido-3,11alpha, 20-triacyloxypregnanes
Assignee: Pharmacia and Upjohn Co
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Filing: 1952-01-18
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Granted: 1954-03-02
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Expires: 1972-01-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank H Lincoln
- 👤 George B Spero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:32
CPC Classifications
C; C07; C07J; C07J21/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
A 17 (20)-OXIDO-3, 11A,20-TRIACYLOXYPREGNANE, WHEREIN THE ACYLOXY GROUPS HAVE THE FORMULA ACO, AC BEING THE ACYL RADICAL OF A HYDROCARBON CARBOXYLIC ACID CONTAINING FROM ONE TO EIGHT CARBON ATOMS, INCLUSIVE.
Claim 2
Dependent Claim
30 words
A 17 (20)-OXIDO-3, 11A,20-TRIACYLOXYPREGNANE, WHEREIN THE ACYLOXY GROUPS HAVE THE FORMULA ACO, AC BEING THE ACYL RADICAL OF A HYDROCARBON CARBOXYLIC ACID CONTAINING FROM ONE TO EIGHT CARBON ATOMS, INCLUSIVE.
References Cited (Backward Citations)
US2265143A
Cited
US2577777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |