Patent US5357525A successfully refreshed from Google Patents.
US2833797A
Expired / Lapsed
US
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Hydroxylated steroid derivatives
Assignee: Merck Sharp & Dohme LLC
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Filing: 1957-12-30
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Granted: 1958-05-06
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Expires: 1977-12-30
Abstract
No abstract record available.
Inventors
- 👤 Emanuel B Hershberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:27
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/832; Y10S435/843
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
COMPOUNDS OF THE GROUP CONSISTING OF 1,4-PREGNADIENE-16A,21-DIOL-3,20-DIONE AND THE LOWER ALKANOYL ESTERS THEREOF.
Claim 2
Dependent Claim
13 words
COMPOUNDS OF THE GROUP CONSISTING OF 1,4-PREGNADIENE-16A,21-DIOL-3,20-DIONE AND THE LOWER ALKANOYL ESTERS THEREOF.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |