US2743720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater for use with a fireplace
Assignee: Individual
•
Filing: 1951-05-19
•
Granted: 1956-05-01
•
Expires: 1971-05-19
Abstract
No abstract record available.
Inventors
- 👤 Lewis L Dollinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:12
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/192; F24B1/185; F24B1/188; F24B1/1885; F24B1/1888
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US737382A
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US813505A
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US1350495A
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US1649881A
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US1670212A
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US1640937A
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US1960763A
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US2052643A
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US2090107A
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US2296354A
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US2429748A
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US2642859A
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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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |