US2806998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ignition coils for internal combustion engines
Assignee: Automobiles Citroen SA
•
Filing: 1952-01-28
•
Granted: 1957-09-17
•
Expires: 1972-01-28
Abstract
No abstract record available.
Inventors
- 👤 Brueder Antoine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:32
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US290820A
Cited
US439081A
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US1569101A
Cited
US1748650A
Cited
US1854401A
Cited
US1998378A
Cited
US2460903A
Cited
US2512796A
Cited
US2706742A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |