US2939873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of steroid phosphates
Assignee: Merck and Co Inc
•
Filing: 1959-01-26
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Granted: 1960-06-07
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Expires: 1979-01-26
Abstract
No abstract record available.
Inventors
- 👤 John M Chemerda
- 👤 Roger J Tull
- 👤 James F Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:31
CPC Classifications
C; C07; C07J; C07J51/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS FOR PRODUCING TERTIARY LOWER ALKYL AMINE SALTS OF INSATURATED PREGNAME-21-DIHYDROGEN PHOSPHATE ESTERS HAVING A GENERAL FORMULA OF THE GROUP CONSISTING OF
Claim 2
Dependent Claim
23 words
A PROCESS FOR PRODUCING TERTIARY LOWER ALKYL AMINE SALTS OF INSATURATED PREGNAME-21-DIHYDROGEN PHOSPHATE ESTERS HAVING A GENERAL FORMULA OF THE GROUP CONSISTING OF
References Cited (Backward Citations)
US2779775A
Cited
US2789117A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |