US2620784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spark plug construction
Assignee: Individual
•
Filing: 1950-07-15
•
Granted: 1952-12-09
•
Expires: 1970-07-15
Abstract
No abstract record available.
Inventors
- 👤 Cipriani Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:10
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/20; H01T13/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1512564A
Cited
US1609735A
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US1840528A
Cited
US2020966A
Cited
US2212725A
Cited
US2301686A
Cited
US2281511A
Cited
US2487531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |