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US2581600A
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US
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Free piston motor compressor
Assignee: D'ETUDES ET DE PARTICIPATIONS Ste
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Filing: 1946-08-30
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Granted: 1952-01-08
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Expires: 1966-08-30
Abstract
No abstract record available.
Inventors
- 👤 Pescara Raul Pateras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:30
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/04; F02B71/06; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB274441A
Cited
US1785643A
Cited
US2178310A
Cited
GB425364A
Cited
US2147935A
Cited
GB447855A
Cited
GB467423A
Cited
US2189497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |