Patent US3553971A successfully refreshed from Google Patents.
US3553971A
Expired / Lapsed
US
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Refrigeration of mobile containers
Assignee: VORTAIR ENGINEERING Ltd
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Filing: 1968-12-17
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Granted: 1971-01-12
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Expires: 1988-12-17
Abstract
Abstract A TRANSPORTABLE CARGO-REFRIGERATING APPARATUS IN WHICH THE CONTAINER OF THE APPARATUS IS REFRIGERATED WITH COLD AIR PRODUCED BY COLD AIR GENERATORS OF THE VORTEX TUBE TYPE. THE HOT AIR OUTLET PIPES OF THE VORTEX TUBE MAY BE CONNECTED TO HEAT THE CONTAINER SO THAT THE APPARATUS CAN BE USED TO TRANSPORT BOTH FROZEN GOODS AND GOODS THAT NEED TO BE KEPT AT A TEMPERATURE ABOVE THAT OF THE AMBIENT ATMOSPHERE.
Inventors
- 👤 Terence Fursdon Crang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:08
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/74; B65D88/745; F; F25; F25B; F25B9/00; F25B9/02; F25B9/04; F25D; F25D11/00; F25D11/003
Claims Analysis
Total Claims: 0
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |