Patent US2550702A successfully refreshed from Google Patents.
US2550702A
Expired / Lapsed
US
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17-ketosteroid mercaptols
Assignee: Pharmacia and Upjohn Co
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Filing: 1948-05-29
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Granted: 1951-05-01
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Expires: 1968-05-29
Abstract
No abstract record available.
Inventors
- 👤 Robert H Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:49
CPC Classifications
C; C07; C07J; C07J31/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A DELTA 5-DEHYDROANDROSTERONE 17-MERCAPTOL HAVING IN THE 17-POSITION THE MERCAPTOL GROUP
Claim 2
Dependent Claim
11 words
A DELTA 5-DEHYDROANDROSTERONE 17-MERCAPTOL HAVING IN THE 17-POSITION THE MERCAPTOL GROUP
References Cited (Backward Citations)
US2453566A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |