Patent US3506668A successfully refreshed from Google Patents.
US3506668A
Expired / Lapsed
US
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Method of preparing 8-hydroxy-quinolines
Assignee: STWB Inc
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Filing: 1968-01-12
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Granted: 1970-04-14
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Expires: 1988-01-12
Abstract
No abstract record available.
Inventors
- 👤 George Y Lesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:05
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/74; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D215/54; C07D215/56; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3172811A
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US3149104A
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US3178348A
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US3267106A
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US3290315A
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US3324135A
Cited
US3377352A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |