Patent US2659361A successfully refreshed from Google Patents.
US2659361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory damper
Assignee: Individual
•
Filing: 1950-04-15
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Granted: 1953-11-17
•
Expires: 1970-04-15
Abstract
No abstract record available.
Inventors
- 👤 Francis C Holbrook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
F; F23; F23L; F23L13/00; F23L13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US480969A
Cited
US810228A
Cited
US1068925A
Cited
US1439410A
Cited
US1524033A
Cited
GB249893A
Cited
GB448663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |