Patent US2864838A successfully refreshed from Google Patents.
US2864838A
Expired / Lapsed
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6 methyl 16 oxy delta4 pregnenes and delta1, 4 pregnadienes
Assignee: Pharmacia and Upjohn Co
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Filing: 1958-02-19
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Granted: 1958-12-16
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Expires: 1978-02-19
Abstract
No abstract record available.
Inventors
- 👤 Frank H Lincoln
- 👤 William P Schneider
- 👤 Oldrich K Sebek
- 👤 George B Spero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:12
CPC Classifications
C; C12; C12P; C12P33/00; C07; C07J; C07J7/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A 16-OXYGENATED STEROID OF THE FORMULA:
Claim 2
Dependent Claim
6 words
A 16-OXYGENATED STEROID OF THE FORMULA:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-15 | 1962-06-16 | 1962-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-15 | 1966-06-16 | 1966-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-15 | 1970-06-16 | 1970-12-16 | $7700.00 | Window Closed / Lapsed |