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Patent US2273176A successfully refreshed from Google Patents.
US2273176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floor heater
Assignee: Individual
•
Filing: 1940-03-25
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Granted: 1942-02-17
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Expires: 1960-03-25
Abstract
No abstract record available.
Inventors
- 👤 Fred C Burt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:02
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; B60H1/00357; B60H1/00364; B60H2001/2268; B60H2001/2293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-02-16 | 1945-08-18 | 1946-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-02-16 | 1949-08-18 | 1950-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-02-16 | 1953-08-18 | 1954-02-17 | $7700.00 | Window Closed / Lapsed |