Patent US2336525A successfully refreshed from Google Patents.
US2552480A
Expired / Lapsed
US
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Electrical heating system
Assignee: Bendix Aviation Corp
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Filing: 1945-10-29
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Granted: 1951-05-08
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Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 John W Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:18
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; H05B3/683; F; F24; F24C; F24C15/00; F24C15/10; F24C15/102; F24C15/106
Claims Analysis
Total Claims: 0
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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) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |