US2928850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
19-nor-pregnatriene compounds and processes for their manufacture
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1955-05-03
•
Granted: 1960-03-15
•
Expires: 1975-05-03
Abstract
No abstract record available.
Inventors
- 👤 Hershel L Herzog
- 👤 Nobile Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
C; C12; C12P; C12P33/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/843
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
19-NOR-PREGNATRIENES OF THE FORMULA:
Claim 2
Dependent Claim
4 words
19-NOR-PREGNATRIENES OF THE FORMULA:
References Cited (Backward Citations)
US2280828A
Cited
GB683900A
Cited
GB745636A
Cited
DE926552C
Cited
US2691300A
Cited
US2691029A
Cited
US2649400A
Cited
US2694080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |