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Patent US2420651A successfully refreshed from Google Patents.
US2420651A
Expired / Lapsed
US
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Ignition device
Assignee: EIDP Inc
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Filing: 1942-12-09
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Granted: 1947-05-20
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Expires: 1962-12-09
Abstract
No abstract record available.
Inventors
- 👤 Burrows Lawton Arthur
- 👤 Loving George Henry
- 👤 Nydegger Roland Roswell
- 👤 Smith Gilbert Havens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:55
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |