US3220212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning unit
Assignee: FRENGER INTERNATIONAL CORP
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Filing: 1964-10-23
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Granted: 1965-11-30
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Expires: 1984-10-23
Abstract
No abstract record available.
Inventors
- 👤 Fordsmand Marc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:36
CPC Classifications
F; F25; F25B; F25B29/00; F25B29/003; F24; F24F; F24F13/00; F24F13/22; F24F3/00; F24F3/001; F24F5/00; F24F5/0089; F25B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
AN AIR CONDITIONING UNIT COMPRISING A SUBSTANTIALLY FLAT BOX-SHAPED CASING HAVING SIDE- AND END WALLS, AN UPPER WALL AND A BOTTOM WALL, MEANS FOR CONNECTING THE INTERIOR OF THE CASING WITH AN EXTERNAL AIR RESERVOIR AND MEANS FOR CONVEYING AN AIR FLOW DERIVED FROM SAID EXTERNAL AIR RESERVOIR THROUGH THE INTERIOR OF THE CASING, A HEAT PUMP SYSTEM WITHIN THE CASING COMPRISING A COMPRESSOR, AT LEAST TWO HEAT EXCHANGERS AND PIPES INTERCONNECTING THE COMPRESSOR AND THE HEAT EXCHANGERS AND FORMING A CIRCUIT FOR CIRCULATING A REFRIGERANT THROUGH THE COMPRESSOR AND HEAT EXCHANGERS, AT LEAST ONE OF SAID HEAT EXCHANGERS BEING ARRANGED IN HEAT EXCHANGE RELATION WITH SAID AIR FLOW, AND AT LEAST ONE OTHER HEAT EXCHANGER BEING ARRANGED IN HEAT EXCHANGE RELATION WITH A RADIANT HEATING AND COOLING PANEL SUBJACENT THE BOTTOM WALL OF SAID CASING.
Claim 2
Dependent Claim
136 words
AN AIR CONDITIONING UNIT COMPRISING A SUBSTANTIALLY FLAT BOX-SHAPED CASING HAVING SIDE- AND END WALLS, AN UPPER WALL AND A BOTTOM WALL, MEANS FOR CONNECTING THE INTERIOR OF THE CASING WITH AN EXTERNAL AIR RESERVOIR AND MEANS FOR CONVEYING AN AIR FLOW DERIVED FROM SAID EXTERNAL AIR RESERVOIR THROUGH THE INTERIOR OF THE CASING, A HEAT PUMP SYSTEM WITHIN THE CASING COMPRISING A COMPRESSOR, AT LEAST TWO HEAT EXCHANGERS AND PIPES INTERCONNECTING THE COMPRESSOR AND THE HEAT EXCHANGERS AND FORMING A CIRCUIT FOR CIRCULATING A REFRIGERANT THROUGH THE COMPRESSOR AND HEAT EXCHANGERS, AT LEAST ONE OF SAID HEAT EXCHANGERS BEING ARRANGED IN HEAT EXCHANGE RELATION WITH SAID AIR FLOW, AND AT LEAST ONE OTHER HEAT EXCHANGER BEING ARRANGED IN HEAT EXCHANGE RELATION WITH A RADIANT HEATING AND COOLING PANEL SUBJACENT THE BOTTOM WALL OF SAID CASING.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |