US2966486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
16alpha, 17alpha-substituted methylene dioxy ethers of steroids of the pregnane series and method of preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1959-03-20
•
Granted: 1960-12-27
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Expires: 1979-03-20
Abstract
No abstract record available.
Inventors
- 👤 Leland L Smith
- 👤 Marx Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:33
CPC Classifications
C; C07; C07J; C07J71/00; C07J75/00; Y; Y10; Y10S; Y10S424/00; Y10S424/13
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA
Claim 3
Independent Claim
9 words
A METHOD OF PREPARING COMPOUNDS HAVING THE GENERAL FORMULA
Claim 4
Independent Claim
9 words
A METHOD OF PREPARING COMPOUNDS HAVING THE GENERAL 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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |