US2478901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric system
Assignee: Individual
•
Filing: 1933-08-16
•
Granted: 1949-08-16
•
Expires: 1953-08-16
Abstract
No abstract record available.
Inventors
- 👤 Harold E Edgerton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:29
CPC Classifications
H; H05; H05B; H05B41/00; H05B41/14; H05B41/30; H05B41/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1410702A
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US1687220A
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US2327971A
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CH120621A
Cited
US1640966A
Cited
US1783234A
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US1956416A
Cited
US1889608A
Cited
US1867398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |