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US2473204A
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Free piston engine control
Assignee: D'ETUDES ET DE PARTICIPATIONS Ste
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Filing: 1947-01-28
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Granted: 1949-06-14
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Expires: 1967-01-28
Abstract
No abstract record available.
Inventors
- 👤 Huber Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:47
CPC Classifications
F; F02; F02C; F02C5/00; F02C5/06; F02C5/08; F02B; F02B71/00; F02B71/04; F02B71/06; F04; F04B; F04B31/00; F04B49/00; F04B49/08; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10S; Y10S60/00; Y10S60/91
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) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |