US2516754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug construction
Assignee: Individual
•
Filing: 1945-07-09
•
Granted: 1950-07-25
•
Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 Cipriani Chester
- 👤 Carl J Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:31
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/46; H01T13/462; H01T13/465
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2376362A
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US1233630A
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US1537903A
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US754666A
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US1518248A
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US1461405A
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US1502682A
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FR555865A
Cited
US1488526A
Cited
FR581361A
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US1613494A
Cited
US1962669A
Cited
US2142383A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |