US2944138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric space heater and method of manufacture
Assignee: ELECTRIC HEATERS Inc
•
Filing: 1957-12-23
•
Granted: 1960-07-05
•
Expires: 1977-12-23
Abstract
No abstract record available.
Inventors
- 👤 James E Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:00
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/20; F24; F24H; F24H3/00; F24H3/002; F28D; F28D1/00; F28D1/02; F28D1/0233; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/49925; Y10T29/49927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2799763A
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US1848716A
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US1664171A
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GB264296A
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FR695636A
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FR39314E
Cited
US2019913A
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US2153267A
Cited
US2347957A
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US2277921A
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US2281299A
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US2578136A
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GB655692A
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GB720939A
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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) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |