US3073816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of producing 21-orthophosphates of steroids and the 21-diamide orthophosphate intermediates therefor
Assignee: Merck KGaA
•
Filing: 1960-11-23
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Granted: 1963-01-15
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Expires: 1980-11-23
Abstract
No abstract record available.
Inventors
- 👤 Irmscher Klaus
- 👤 Schumann Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:54
CPC Classifications
C; C07; C07J; C07J51/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
IN A METHOD OF PREPARING 21-ORTHOPHOSPHATES OF STEROIDS OF THE PREGNANE SERIES HAVING THE FORMULA
Claim 2
Dependent Claim
15 words
IN A METHOD OF PREPARING 21-ORTHOPHOSPHATES OF STEROIDS OF THE PREGNANE SERIES HAVING THE FORMULA
Claim 3
Dependent Claim
7 words
A STEROID-21-ORTHOPHOSPHATE OF THE FOLLOWING FORMULA I:
Claim 4
Dependent Claim
7 words
A STEROID-21-ORTHOPHOSPHATE OF THE FOLLOWING FORMULA I:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |