Patent US2805232A successfully refreshed from Google Patents.
US2805232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing crystalline hydrocortisone acetate
Assignee: Merck and Co Inc
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Filing: 1954-02-26
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Granted: 1957-09-03
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Expires: 1974-02-26
Abstract
No abstract record available.
Inventors
- 👤 William H Baade
- 👤 Thomas J Macek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:16
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
THE PROCESS OF PREPARING MICROCRYSTALLINE HYDROCORTISONE ACETATE WHICH COMPRISES CRYSTALLIZING HYDROCORTISONE ACETATE FROM AN AQUEOUS MIXTURE COMPRISING AN N,N-DIALKYL-AMIDE.
Claim 2
Dependent Claim
19 words
THE PROCESS OF PREPARING MICROCRYSTALLINE HYDROCORTISONE ACETATE WHICH COMPRISES CRYSTALLIZING HYDROCORTISONE ACETATE FROM AN AQUEOUS MIXTURE COMPRISING AN N,N-DIALKYL-AMIDE.
References Cited (Backward Citations)
US2671750A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |