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US2551101A
Expired / Lapsed
US
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Electrical ignition system
Assignee: Individual
•
Filing: 1949-03-09
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Granted: 1951-05-01
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Expires: 1969-03-09
Abstract
No abstract record available.
Inventors
- 👤 Debenham William Richard
- 👤 Shenton John Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:13
CPC Classifications
F; F02; F02P; F02P15/00; F02P15/001; F02P15/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2030228A
Cited
US2497307A
Cited
US1962669A
Cited
US2017364A
Cited
GB536460A
Cited
US2456475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |