US3552120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stirling cycle type thermal device
Assignee: Research Corp
•
Filing: 1969-03-05
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Granted: 1971-01-05
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Expires: 1989-03-05
Abstract
Abstract A STIRLING CYCLE THERMAL ENGINE OR REFRIGERATING DEVICE WHEREIN THERE IS NO PRIMARY MECHANICAL CONNECTION BETWEEN THE DISPLACER PISTONS AND THEIR ASSOCIATED POWER PISTONS, INCLUDING VARIOUS MECHANICAL AND PRESSURE FLUID MEANS FOR VARYING THE POWER OUTPUT FROM OR THE POWER INPUT TO THE DEVICE.
Inventors
- 👤 William T Beale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:26
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F02G1/0435; F02G1/053; F02G1/055; F02G2244/00; F02G2244/50
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |