US2878299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug
Assignee: Individual
•
Filing: 1954-12-23
•
Granted: 1959-03-17
•
Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Allan M Starr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:21
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1142511A
Cited
US2046263A
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US2126442A
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US2422610A
Cited
US2246019A
Cited
US2271606A
Cited
US2231173A
Cited
US2226711A
Cited
US2597794A
Cited
US2526933A
Cited
US2526169A
Cited
US2693082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |