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US3530123A
Expired / Lapsed
US
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3-thiolated-7-sydnone-acylamino-cephalosporanic acid derivatives
Assignee: Astellas Pharma Inc
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Filing: 1967-10-31
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Granted: 1970-09-22
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Expires: 1987-10-31
Abstract
No abstract record available.
Inventors
- 👤 Tadayoshi Takano
- 👤 Hirokichi Harada
- 👤 Masaru Kurita
- 👤 Masashi Hashimoto
- 👤 Hiroo Nikaido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:53
CPC Classifications
C; C07; C07D; C07D501/00; C07D501/14; C07D501/16; C07D501/20; C07D501/24; C07D501/36; C07D501/38; C07D501/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3345368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |