Patent US2889439A successfully refreshed from Google Patents.
US2889439A
Expired / Lapsed
US
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Electric heating devices and the like
Assignee: Individual
•
Filing: 1955-07-29
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Granted: 1959-06-02
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Expires: 1975-07-29
Abstract
No abstract record available.
Inventors
- 👤 Barrington Le B Musgrave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:07
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; F; F24; F24D; F24D13/00; F24D13/02; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1632651A
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US1963554A
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US2559077A
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US2540295A
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US2613306A
Cited
US2502147A
Cited
US2613308A
Cited
US2600486A
Cited
US2623150A
Cited
US2777930A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |