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US3406175A
Expired / Lapsed
US
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1', 3'-dioxo-1', 2', 3', 4'-tetrahydrospiro[cyclopentane-1, 4'-isoquinoline] and itspreparation
Assignee: STWB Inc
•
Filing: 1966-08-23
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Granted: 1968-10-15
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Expires: 1986-08-23
Abstract
No abstract record available.
Inventors
- 👤 George Y Lesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:20
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3040048A
Cited
US3314960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-15 | 1972-04-15 | 1972-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-15 | 1976-04-15 | 1976-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-15 | 1980-04-15 | 1980-10-15 | $7700.00 | Window Closed / Lapsed |