US3532703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,2,5,5-tetrasubstituted-4-oxoimidazolidine-1-oxides
Assignee: Sankyo Co Ltd
•
Filing: 1967-06-15
•
Granted: 1970-10-06
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Expires: 1987-06-15
Abstract
No abstract record available.
Inventors
- 👤 Keisuke Murayama
- 👤 Syoji Morimura
- 👤 Toshimasa Toda
- 👤 Tomizi Tsuzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:15
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/32; C07D233/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-05 | 1974-04-06 | 1974-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-05 | 1978-04-06 | 1978-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-05 | 1982-04-06 | 1982-10-06 | $7700.00 | Window Closed / Lapsed |