US3071580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
6beta-hydroxy-16alpha, 17alpha-alkylidendioxy-11-oxygenated pregnenes
Assignee: Wyeth Holdings LLC
•
Filing: 1961-04-28
•
Granted: 1963-01-01
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Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 Chester E Holmlund
- 👤 Louis I Feldman
- 👤 Jr Ralph H Evans
- 👤 Berustein Seymour
- 👤 John P Dusza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
C; C12; C12P; C12P33/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
4 words
COMPOUNDS OF THE 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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |