US3123984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
leonard
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN AN ABSORPTION REFRIGERATION MACHINE COMPRISING AN ABSORBER, A GENERATOR, A CONDENSER AND AN EVAPORATOR OPERATIVELY CONNECTED IN A REFRIGERATION CIRCUIT, SAID CONDENSER AND SAID ABSORBER EACH COMPRISING HEAT EXCHANGERS, THE IMPROVEMENT COMPRISING AT LEAST ONE OF SAID HEAT EXCHANGES HAVING A PAIR OF TUBE SHEETS AT ONE END THEREOF, EACH OF SAID TUBE SHEETS BEING SPACED FROM EACH OTHER AND FORMING A CHAMBER THEREBETWEEN, EACH OF A PLURALITY OF HEAT EXCHANGE TUBES BEING SEALINGLY ENGAGED WITH BOTH OF SAID PAIR OF TUBE SHEETS, A SUBSTANTIALLY INCOMPRESSIBLE FLUID FILLING SAID CHAMBER TO A LEVEL ABOVE SAID TUBES, AND MEANS RESPONSIVE TO BOTH INCREASED AND DECREASED CHANGES IN PRESSURE EXERTED ON SAID FLUID TO INDICATE LEAKAGE AT SAID CHAMBER.
Claim 2
Dependent Claim
118 words
IN AN ABSORPTION REFRIGERATION MACHINE COMPRISING AN ABSORBER, A GENERATOR, A CONDENSER AND AN EVAPORATOR OPERATIVELY CONNECTED IN A REFRIGERATION CIRCUIT, SAID CONDENSER AND SAID ABSORBER EACH COMPRISING HEAT EXCHANGERS, THE IMPROVEMENT COMPRISING AT LEAST ONE OF SAID HEAT EXCHANGES HAVING A PAIR OF TUBE SHEETS AT ONE END THEREOF, EACH OF SAID TUBE SHEETS BEING SPACED FROM EACH OTHER AND FORMING A CHAMBER THEREBETWEEN, EACH OF A PLURALITY OF HEAT EXCHANGE TUBES BEING SEALINGLY ENGAGED WITH BOTH OF SAID PAIR OF TUBE SHEETS, A SUBSTANTIALLY INCOMPRESSIBLE FLUID FILLING SAID CHAMBER TO A LEVEL ABOVE SAID TUBES, AND MEANS RESPONSIVE TO BOTH INCREASED AND DECREASED CHANGES IN PRESSURE EXERTED ON SAID FLUID TO INDICATE LEAKAGE AT SAID 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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |