US3248893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration apparatus
Assignee: Westinghouse Electric Corp
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Filing: 1965-02-08
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Granted: 1966-05-03
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Expires: 1985-02-08
Abstract
No abstract record available.
Inventors
- 👤 John A Mclean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:25
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/062; F25D17/065; F25D21/00; F25D21/06; F25D17/042; F25D17/045; F25D2317/00; F25D2317/06; F25D2317/065; F25D2317/0651; F25D2317/0655; F25D2317/066; F25D2317/0661; F25D2317/0664; F25D2317/0665; F25D2400/00; F25D2400/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN APPARATUS HAVING A FREEZING COMPARTMENT AND AN ABOVE-FREEZING COMPARTMENT, A REFRIGERATION SYSTEM FOR SAID COMPARTMENTS INCLUDING A COMPRESSOR, A CONDENSER AND AN EVAPORATOR, MEANS DEFINNG A COMPARTMENT FOR SAID EVAPORATOR, SAID EVAPORATOR COMPARTMENT HAVING AN INLET THERETO FROM THE FREEZER COMPARTMENT AND AN OUTLET THEREFROM TO SAID FREEZER COMPARTMENT, AND HAVING AN INLET THERETO FROM THE ABOVE-FREEZING COMPARTMENT AND AN OUTLET THEREFROM THE SAID ABOVE-FREEZING COMPARTMENT, DAMPER MEANS FOR CONTROLLING FLOW OF AIR THROUGH SAID EVAPORATOR COMPARTMENT INLET AND OUTLET, CONTROL MEANS FOR ADJUSTING SAID DAMPER MEANS FROM A FIRST POSITION WHEREIN THE INLET AND OUTLET COMMUNICATING WITH THE FREEZER COMPARTMENT ARE OPEN AND THE INLET AND OUTLET COMMUNICATION WITH THE ABOVE-FREEZING COMPARTMENT ARE CLOSED TO A SECOND POSITION WHEREIN THE INLET AND OUTLET COMMUNICATING WITH THE FREEZER COMPARTMENT ARE CLOSED AND THE INLET AND OUTLET COMMUNICATING WITH THE ABOVEFREEZING COMPARTMENT ARE OPEN, SAID CONTROL MEANS PRO-
Claim 2
Dependent Claim
148 words
IN APPARATUS HAVING A FREEZING COMPARTMENT AND AN ABOVE-FREEZING COMPARTMENT, A REFRIGERATION SYSTEM FOR SAID COMPARTMENTS INCLUDING A COMPRESSOR, A CONDENSER AND AN EVAPORATOR, MEANS DEFINNG A COMPARTMENT FOR SAID EVAPORATOR, SAID EVAPORATOR COMPARTMENT HAVING AN INLET THERETO FROM THE FREEZER COMPARTMENT AND AN OUTLET THEREFROM TO SAID FREEZER COMPARTMENT, AND HAVING AN INLET THERETO FROM THE ABOVE-FREEZING COMPARTMENT AND AN OUTLET THEREFROM THE SAID ABOVE-FREEZING COMPARTMENT, DAMPER MEANS FOR CONTROLLING FLOW OF AIR THROUGH SAID EVAPORATOR COMPARTMENT INLET AND OUTLET, CONTROL MEANS FOR ADJUSTING SAID DAMPER MEANS FROM A FIRST POSITION WHEREIN THE INLET AND OUTLET COMMUNICATING WITH THE FREEZER COMPARTMENT ARE OPEN AND THE INLET AND OUTLET COMMUNICATION WITH THE ABOVE-FREEZING COMPARTMENT ARE CLOSED TO A SECOND POSITION WHEREIN THE INLET AND OUTLET COMMUNICATING WITH THE FREEZER COMPARTMENT ARE CLOSED AND THE INLET AND OUTLET COMMUNICATING WITH THE ABOVEFREEZING COMPARTMENT ARE OPEN, SAID CONTROL MEANS PRO-
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |