Patent US2497486A successfully refreshed from Google Patents.
US2497486A
Expired / Lapsed
US
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Fireplace with supplemental draft means
Assignee: Individual
•
Filing: 1945-11-05
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Granted: 1950-02-14
•
Expires: 1965-11-05
Abstract
No abstract record available.
Inventors
- 👤 William V Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:37
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/189; F24B1/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US12491A
Cited
US131994A
Cited
US606667A
Cited
US948007A
Cited
GB191028089A
Cited
US1672115A
Cited
GB411890A
Cited
GB460136A
Cited
US2120977A
Cited
US2258882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |