Patent US3518256A successfully refreshed from Google Patents.
US3518256A
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US
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2 - (2 - (5 - nitro - 2 - furyl)vinyl)pyridine derivatives and process for preparation thereof
Assignee: Sumitomo Pharma Co Ltd
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Filing: 1965-07-19
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Granted: 1970-06-30
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Shinsaku Minami
- 👤 Minoru Nakata
- 👤 Katsuro Fujimoto
- 👤 Yoshiyuki Takase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:11
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/06; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/44
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |