Patent US2695906A successfully refreshed from Google Patents.
US2695906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pregnadienes
Assignee: Pharmacia and Upjohn Co
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Filing: 1953-03-30
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Granted: 1954-11-30
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Expires: 1973-03-30
Abstract
No abstract record available.
Inventors
- 👤 John A Hogg
- 👤 Philip F Beal
- 👤 Jr Frank H Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:58
CPC Classifications
C; C07; C07J; C07J13/00; C07J75/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
COMPOUND REPRESENTED BY THE FOLLOWING 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) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |