Patent US2643284A successfully refreshed from Google Patents.
US2643284A
Expired / Lapsed
US
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Ignition system
Assignee: Ambac International Corp
•
Filing: 1950-02-09
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Granted: 1953-06-23
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Expires: 1970-02-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:49
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/001; F02P15/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1537903A
Cited
US2030228A
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US2472671A
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US2507277A
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US1946563A
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US2193585A
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US2197114A
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US2447377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |