Patent US2481165A successfully refreshed from Google Patents.
US2481165A
Expired / Lapsed
US
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Down and cross draft heater including airtight ash pit
Assignee: Individual
•
Filing: 1949-02-02
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Granted: 1949-09-06
•
Expires: 1969-02-02
Abstract
No abstract record available.
Inventors
- 👤 Bertrand A Landry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:37
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US552911A
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US2403829A
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US2456570A
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US905366A
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US1034799A
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US1544582A
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US1501847A
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US1561497A
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Cited
US2295781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |