US2456076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spark circuit
Assignee: —
•
Filing: —
•
Granted: 1948-12-14
•
Expires: 1965-12-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:30
CPC Classifications
—
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2222498A
Cited
US617067A
Cited
US1305361A
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US1507306A
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US489277A
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US873036A
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US1139623A
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US1482192A
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US1376846A
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US1597901A
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US1615995A
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US1872369A
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US1769906A
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US1972319A
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US2154041A
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US2126199A
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US2142530A
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US2196442A
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US2227349A
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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) | 1951-12-14 | 1952-06-14 | 1952-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-12-14 | 1956-06-14 | 1956-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-12-14 | 1960-06-14 | 1960-12-14 | $7700.00 | Window Closed / Lapsed |