US2708428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling flame propagation in internal combustion engines
Assignee: MARY R FISHER
•
Filing: 1951-03-19
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Granted: 1955-05-17
•
Expires: 1971-03-19
Abstract
No abstract record available.
Inventors
- 👤 Bernard C Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:16
CPC Classifications
F; F02; F02B; F02B19/00; F02B19/12; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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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) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |