Patent US2847826A successfully refreshed from Google Patents.
US2847826A
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US
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Pulsating torch igniter
Assignee: National Research Council Canada
•
Filing: 1953-09-08
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Granted: 1958-08-19
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Expires: 1973-09-08
Abstract
No abstract record available.
Inventors
- 👤 Howes Leslie Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:43
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/26; F02C7/264
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2525207A
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US2543758A
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US2664702A
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US2560223A
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US2602293A
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US2643511A
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US2667740A
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US2701445A
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US2654997A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |