US2980713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
16-methyl-3alpha, 17alpha-dihydroxy steroids of the pregnane series
Assignee: Merck and Co Inc
•
Filing: 1958-09-05
•
Granted: 1961-04-18
•
Expires: 1978-09-05
Abstract
No abstract record available.
Inventors
- 👤 John M Chemerda
- 👤 Edward W Tristram
- 👤 David F Hinkley
- 👤 Broeke Jan Ten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
C; C07; C07J; C07J41/00; C07J5/00; C07J75/00; C07J9/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
5 words
COMPOUNDS HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2640839A
Cited
US2789989A
Cited
US2849463A
Cited
US2777843A
Cited
US2811537A
Cited
US2837541A
Cited
US2854383A
Cited
US2838499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |