Patent US3020706A successfully refreshed from Google Patents.
US3020706A
Expired / Lapsed
US
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Control means for free-piston or semi-free piston engines
Assignee: Societe dEtudes et de Participations Eau Gaz Electricite Energie SA
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Filing: 1958-11-28
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Granted: 1962-02-13
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Horgen Helge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:16
CPC Classifications
F; F02; F02C; F02C5/00; F02C5/06; F02C5/08; F01; F01B; F01B11/00; F02B; F02B71/00; F02D; F02D39/00; F02D39/10; 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |