US3116289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
20-keto-17, 21-alkylidenedioxy steroids and processes for their manufacture and transformation
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1961-08-21
•
Granted: 1963-12-31
•
Expires: 1981-08-21
Abstract
No abstract record available.
Inventors
- 👤 Tanabe Masato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:17
CPC Classifications
C; C07; C07J; C07J21/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/85; Y10S435/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF PREGNADIENES HAVING ONE OF THE STRUCTURAL FORMULAE:
Claim 2
Dependent Claim
14 words
A COMPOUND OF THE GROUP CONSISTING OF PREGNADIENES HAVING ONE OF THE STRUCTURAL FORMULAE:
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) | 1966-12-30 | 1967-07-01 | 1967-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-30 | 1971-07-01 | 1971-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-30 | 1975-07-01 | 1975-12-31 | $7700.00 | Window Closed / Lapsed |