US2415979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined spark plug and oscillatory circuit
Assignee: RTX Corp
•
Filing: 1945-04-24
•
Granted: 1947-02-18
•
Expires: 1965-04-24
Abstract
No abstract record available.
Inventors
- 👤 Mertens Ernest K Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:11
CPC Classifications
H; H01; H01T; H01T13/00; H01T13/02; H01T13/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1393866A
Cited
US1395375A
Cited
US2093484A
Cited
US2378893A
Cited
US2347286A
Cited
US2372429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-02-17 | 1950-08-19 | 1951-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-02-17 | 1954-08-19 | 1955-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-02-17 | 1958-08-19 | 1959-02-18 | $7700.00 | Window Closed / Lapsed |