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US3475275A
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Method for the production of 3alpha,5-cyclo-6beta,19-oxido-5alpha- androstan-17-one
Assignee: Sankyo Co Ltd
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Filing: 1967-01-26
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Granted: 1969-10-28
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Expires: 1987-01-26
Abstract
No abstract record available.
Inventors
- 👤 Makoto Shirasaka
- 👤 Atsushi Naito
- 👤 Katsumi Tanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:38
CPC Classifications
C; C12; C12P; C12P33/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/83; Y10S435/843
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3388042A
Cited
US3398054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |