Patent US3534048A successfully refreshed from Google Patents.
US3534048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2-dimethyl-4,4,6,6-tetrasubstituted-piperidine-1-oxide derivatives
Assignee: Sankyo Co Ltd
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Filing: 1967-06-01
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Granted: 1970-10-13
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Expires: 1987-06-01
Abstract
No abstract record available.
Inventors
- 👤 Keisuke Murayama
- 👤 Syoji Morimura
- 👤 Takao Yoshioka
- 👤 Susumu Higasida
- 👤 Eiko Yamao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:01
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/20; C07D211/00; C07D211/92; C07D211/94; C07D471/00; C07D471/02; C07D471/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB837747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |