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US2701555A
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Free piston internal-combustion engine
Assignee: & De Participations Soc Et
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Filing: 1949-10-04
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Granted: 1955-02-08
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Expires: 1969-10-04
Abstract
No abstract record available.
Inventors
- 👤 Huber Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:45
CPC Classifications
F; F02; F02B; F02B71/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2007305A
Cited
GB430042A
Cited
US2178310A
Cited
GB438418A
Cited
FR866568A
Cited
US2423720A
Cited
GB568382A
Cited
US2408089A
Cited
US2463051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-07 | 1958-08-09 | 1959-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-07 | 1962-08-09 | 1963-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-07 | 1966-08-09 | 1967-02-08 | $7700.00 | Window Closed / Lapsed |