US2880204A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-ethylene glycol ketal of 11alpha-lower alkyl 11beta-hydroxy-21-acyloxy-5, 17(20)-pregnadiene-3-one
Assignee: Pharmacia and Upjohn Co
•
Filing: 1955-05-23
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Granted: 1959-03-31
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Gunther S Fonken
- 👤 John A Hogg
- 👤 Barney J Magerlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:05
CPC Classifications
C; C07; C07J; C07J21/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
3-CYCLIC KETAL-21-HYDROCARBON ETHERS OF 11A-LOWERALKYL-11B,21 - DIHYDROXY - 5,17(20) - PREGNADIENE - 3-ONE REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
18 words
3-CYCLIC KETAL-21-HYDROCARBON ETHERS OF 11A-LOWERALKYL-11B,21 - DIHYDROXY - 5,17(20) - PREGNADIENE - 3-ONE REPRESENTED BY THE FOLLOWING FORMULA:
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |