US2773072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steroid hydrolysis
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-06-17
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Granted: 1956-12-04
•
Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Milton E Herr
- 👤 Frederick W Heyl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:01
CPC Classifications
C; C07; C07J; C07J43/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A 3-KETO STEROID SELECTED FROM CHOLESTANE AND PREGNANE COMPOUNDS WHICH COMPRISES: MIXING A 3-TERTIARY AMINO STEROID SELECTED FROM CHOLESTENE AND PREGNENE COMPOUNDS, HAVING AN UNCONJUGATED DOUBLE BOND ALPHA TO THE AMINO NITROGEN ATOM, WITH AN ESSENTIALLY NEUTRAL ORGANIC SOLVENT CONTAINING WATER TO PRODUCE A SECONDARY AMINE AND SAID 3-KETO STEROID COMPOUND.
Claim 2
Dependent Claim
57 words
A PROCESS FOR THE PRODUCTION OF A 3-KETO STEROID SELECTED FROM CHOLESTANE AND PREGNANE COMPOUNDS WHICH COMPRISES: MIXING A 3-TERTIARY AMINO STEROID SELECTED FROM CHOLESTENE AND PREGNENE COMPOUNDS, HAVING AN UNCONJUGATED DOUBLE BOND ALPHA TO THE AMINO NITROGEN ATOM, WITH AN ESSENTIALLY NEUTRAL ORGANIC SOLVENT CONTAINING WATER TO PRODUCE A SECONDARY AMINE AND SAID 3-KETO STEROID COMPOUND.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |