US3494942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Total synthesis of 13-hydrocarbon-substituted gonapolyenes
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1967-11-13
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Granted: 1970-02-10
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Takuichi Miki
- 👤 Kentaro Hiraga
- 👤 Tsunehiko Asako
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:32
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/565; A61K31/566; C; C07; C07J; C07J1/00; C07J1/0051; C07J1/0059; C07J1/0066; C07J1/007
Claims Analysis
Total Claims: 0
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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) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |