US2680432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug
Assignee: Individual
•
Filing: 1951-09-13
•
Granted: 1954-06-08
•
Expires: 1971-09-13
Abstract
No abstract record available.
Inventors
- 👤 Robert E Rand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:21
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1929203A
Cited
US2473241A
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US1904273A
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US2197006A
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US2206073A
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US2351029A
Cited
US2445777A
Cited
US2367840A
Cited
US2508354A
Cited
US2416643A
Cited
US2479577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |