US2666569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for combined fluid compressors and free piston machines
Assignee: Westinghouse Air Brake Co
•
Filing: 1948-05-25
•
Granted: 1954-01-19
•
Expires: 1968-05-25
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Bent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:57
CPC Classifications
F; F02; F02B; F02B71/00; F02B71/04; F04; F04B; F04B31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US685704A
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US2116939A
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US2434280A
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US2600251A
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US2557982A
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US2608052A
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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) | 1957-01-18 | 1957-07-20 | 1958-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-18 | 1961-07-20 | 1962-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-18 | 1965-07-20 | 1966-01-19 | $7700.00 | Window Closed / Lapsed |