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US2900547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plugs and the like
Assignee: Individual
•
Filing: 1956-08-03
•
Granted: 1959-08-18
•
Expires: 1976-08-03
Abstract
No abstract record available.
Inventors
- 👤 Engel Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:15
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603200A
Cited
US1152272A
Cited
US1361967A
Cited
US1491752A
Cited
US1775007A
Cited
US1754796A
Cited
US2391456A
Cited
DE922384C
Cited
US2760099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |