US3068223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate derivatives of steroids
Assignee: Merck and Co Inc
•
Filing: 1958-11-18
•
Granted: 1962-12-11
•
Expires: 1978-11-18
Abstract
No abstract record available.
Inventors
- 👤 John P Conbere
- 👤 Iii Karl Pfister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:39
CPC Classifications
C; C07; C07J; C07J21/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
6 words
A COMPOUND HAVING THE GENERAL FORMULA
References Cited (Backward Citations)
US2668816A
Cited
US2713587A
Cited
US2684968A
Cited
US2842568A
Cited
US2870177A
Cited
US2779775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |