US2567268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of steroid sulfates
Assignee: Wyeth Canada Inc
•
Filing: 1951-03-08
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Granted: 1951-09-11
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Expires: 1971-03-08
Abstract
No abstract record available.
Inventors
- 👤 Beall Desmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:03
CPC Classifications
C; C07; C07J; C07J75/00; C07J1/00; C07J9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A PROCESS FOR HYDROLYZING A WATER-SOLUBLE STEOID SULPHATE, COMPRISISNG, CONTACTING SAID STEROID SULPHATE WITH DIOXANE TO CONVERT THE WATER-SOLUBLE STEROID TO THE FREE STEROID.
Claim 2
Dependent Claim
24 words
A PROCESS FOR HYDROLYZING A WATER-SOLUBLE STEOID SULPHATE, COMPRISISNG, CONTACTING SAID STEROID SULPHATE WITH DIOXANE TO CONVERT THE WATER-SOLUBLE STEROID TO THE FREE STEROID.
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) | 1954-09-10 | 1955-03-12 | 1955-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-10 | 1959-03-12 | 1959-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-10 | 1963-03-12 | 1963-09-11 | $7700.00 | Window Closed / Lapsed |