US3477226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump heat rejection system for a closed cycle hot gas engine
Assignee: Motors Liquidation Co
•
Filing: 1968-02-27
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Granted: 1969-11-11
•
Expires: 1988-02-27
Abstract
No abstract record available.
Inventors
- 👤 Worth H Percival
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
F; F25; F25B; F25B27/00; F25B27/02; F02; F02G; F02G1/00; F02G1/04; F02G1/043; F25B9/00; F25B9/002; F25B9/004; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02A30/274
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2664698A
Cited
US3399526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-10 | 1973-05-12 | 1973-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-10 | 1977-05-12 | 1977-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-10 | 1981-05-12 | 1981-11-11 | $7700.00 | Window Closed / Lapsed |