US2969582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug and process for making the same
Assignee: —
•
Filing: —
•
Granted: 1961-01-31
•
Expires: 1978-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:53
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T21/00; H01T21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2578754A
Cited
US2699158A
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US1281429A
Cited
US1363843A
Cited
US2064089A
Cited
US2360287A
Cited
US2377481A
Cited
US2717438A
Cited
US2592754A
Cited
US2712685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |