Patent US2890365A successfully refreshed from Google Patents.
US2890365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual firing spark plug
Assignee: Individual
•
Filing: 1955-06-28
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Granted: 1959-06-09
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Expires: 1975-06-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Major
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:49
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/46; H01T13/462
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1375079A
Cited
US1077325A
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US1073699A
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US1259267A
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US1342431A
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US1465582A
Cited
US1523069A
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US2470821A
Cited
US2815463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-08 | 1962-12-08 | 1963-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-08 | 1966-12-08 | 1967-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-08 | 1970-12-08 | 1971-06-09 | $7700.00 | Window Closed / Lapsed |