US2600486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric heater
Assignee: Individual
•
Filing: 1951-02-07
•
Granted: 1952-06-17
•
Expires: 1971-02-07
Abstract
No abstract record available.
Inventors
- 👤 Duncan B Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:42
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/36; H05B2203/00; H05B2203/002; H05B2203/004; H05B2203/005; H05B2203/011; H05B2203/013; H05B2203/017; H05B2203/026; H05B2203/032; H05B2203/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE77262C
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US617375A
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US636203A
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US791691A
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GB225627A
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GB224648A
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US2165970A
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US2110660A
Cited
GB447453A
Cited
US2075733A
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US2273941A
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US2504146A
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GB550433A
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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) | 1955-06-17 | 1955-12-17 | 1956-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-17 | 1959-12-17 | 1960-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-17 | 1963-12-17 | 1964-06-17 | $7700.00 | Window Closed / Lapsed |