Patent US2816121A successfully refreshed from Google Patents.
US2816121A
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New progestational agents
Assignee: Merck Sharp & Dohme LLC
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Filing: 1957-01-25
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Granted: 1957-12-10
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Expires: 1977-01-25
Abstract
No abstract record available.
Inventors
- 👤 David H Gould
- 👤 Hershel L Herzog
- 👤 Emanuel B Hershberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:37
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
UNSATURATED STEROIDS HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
6 words
UNSATURATED STEROIDS HAVING 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) | 1960-12-09 | 1961-06-10 | 1961-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-09 | 1965-06-10 | 1965-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-09 | 1969-06-10 | 1969-12-10 | $7700.00 | Window Closed / Lapsed |