Patent US2864830A successfully refreshed from Google Patents.
US2864830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11-oxygenated derivatives of delta4, 6-19-norandrostadiene
Assignee: Pfizer Inc
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Filing: 1957-05-08
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Granted: 1958-12-16
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Expires: 1977-05-08
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Agnello
- 👤 Gerald D Laubach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:42
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THOSE HAVING THE FORMULA
References Cited (Backward Citations)
US2695260A
Cited
US2739974A
Cited
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 |