US2461168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant spark plug
Assignee: Individual
•
Filing: 1944-07-11
•
Granted: 1949-02-08
•
Expires: 1964-07-11
Abstract
No abstract record available.
Inventors
- 👤 Oran T Mcilvaine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:28
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1589489A
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US2408881A
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US1444836A
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US1666833A
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US2093848A
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US2139793A
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US2127513A
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US2289846A
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US2347286A
Cited
US2408407A
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US2372429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-08 | 1952-08-09 | 1953-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-08 | 1956-08-09 | 1957-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-08 | 1960-08-09 | 1961-02-08 | $7700.00 | Window Closed / Lapsed |