Patent US3071935A successfully refreshed from Google Patents.
US3071935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic refrigeration and defrost system
Assignee: Individual
•
Filing: 1959-04-08
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Granted: 1963-01-08
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Expires: 1979-04-08
Abstract
No abstract record available.
Inventors
- 👤 Kapeker Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
AN AUTOMATIC HOT GAS DEFROST SYSTEM COMPRISING A COMPRESSOR, A SOLENOID-CONTROLLED VALVE, EVAPORATOR COILS, A HEAT EXCHANGER, A RE-EVAPORATOR CHAMBER AND A TIMER SWITCH CONNECTED WITH AN ELECTRIC CIRCUIT, CONDUIT MEANS CONNECTING THE COMPRESSOR WITH THE EVAPORATOR COILS AND THE HEAT EXCHANGER AND CONDUIT MEANS TO RETURN THE REFRIGERANT FROM THE HEAT EXCHANGER THROUGH THE RE-EVAPORATOR CHAMBER TO THE COMPRESSOR, THE RE-EVAPORATOR CHAMBER DISPOSED INTERMEDIATE THE RETURN CONDUIT ADJACENT THE COMPRESSOR AND ADAPTED TO RECEIVE THE REFRIGERANT AND TO RETAIN THE LIQUID PORTION THEREOF, MEANS PROVIDED WITHIN THE CHAMBER IN DIRECT CONTACT WITH THE REFRIGERANT AND ADAPTED TO BE ACTIVATED BY THE TIMER SWITCH TO VAPORIZE THE LIQUID REFRIGERANT WITHIN THE CHAMBER.
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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |