Patent US2665683A successfully refreshed from Google Patents.
US2665683A
Expired / Lapsed
US
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Thermally controlled fireplace damper
Assignee: W B SNOOK Manufacturing Co Inc
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Filing: 1948-10-05
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Granted: 1954-01-12
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Expires: 1968-10-05
Abstract
No abstract record available.
Inventors
- 👤 Walter B Snook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:16
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/189; F24B1/1895
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |