Patent US3138938A successfully refreshed from Google Patents.
US3138938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorption refrigeration apparatus
Assignee: MONTCALM Inc
•
Filing: 1962-12-20
•
Granted: 1964-06-30
•
Expires: 1982-12-20
Abstract
No abstract record available.
Inventors
- 👤 Lewis D Beardslee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:16
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/04; F25B49/00; F25B49/04; F25B49/043; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN AN ABSORPTION REFRIGERATION SYSTEM COMPRISING A CLOSED CIRCUIT INCLUDING A GENERATOR AND A CONDENSER OPERATING AT HIGH PRESSURE AND AN EVAPORATOR AND ABSORBER OPERATING AT LOW PRESSURE WITH A REFRIGERANT-ABSORBENT SOLUTION FILLING THE GENERATOR AND ABSORBER TO PREDETERMINED LEVELS, MEANS FOR CONTROLLING THE AMOUNT OF REFRIGERANT CIRCULATING IN SAID SYSTEM COMPRISING A CHAMBER, A PISTON SLIDABLY MOUNTED IN SAID CHAMBER, MEANS CONNECTING A FIRST SPACE IN SAID CHAMBER AT ONE SIDE OF SAID PISTON TO THE OUTLET END OF SAID CONDENSER WHEREBY SAID FIRST SPACE IS FILLED WITH REFRIGERANT, MEANS CONNECTING A SECOND SPACE AT THE OPPOSITE SIDE OF SAID PISTON TO SAID ABSORBER WHEREBY SAID SECOND SPACE IS FILLED WITH REFRIGERANT-ABSORBENT SOLUTION WHEREBY WHEN THE PRESSURE OF SAID REFRIGERANT INCREASES, SAID PISTON IS MOVED IN A DIREC-
Claim 2
Dependent Claim
129 words
IN AN ABSORPTION REFRIGERATION SYSTEM COMPRISING A CLOSED CIRCUIT INCLUDING A GENERATOR AND A CONDENSER OPERATING AT HIGH PRESSURE AND AN EVAPORATOR AND ABSORBER OPERATING AT LOW PRESSURE WITH A REFRIGERANT-ABSORBENT SOLUTION FILLING THE GENERATOR AND ABSORBER TO PREDETERMINED LEVELS, MEANS FOR CONTROLLING THE AMOUNT OF REFRIGERANT CIRCULATING IN SAID SYSTEM COMPRISING A CHAMBER, A PISTON SLIDABLY MOUNTED IN SAID CHAMBER, MEANS CONNECTING A FIRST SPACE IN SAID CHAMBER AT ONE SIDE OF SAID PISTON TO THE OUTLET END OF SAID CONDENSER WHEREBY SAID FIRST SPACE IS FILLED WITH REFRIGERANT, MEANS CONNECTING A SECOND SPACE AT THE OPPOSITE SIDE OF SAID PISTON TO SAID ABSORBER WHEREBY SAID SECOND SPACE IS FILLED WITH REFRIGERANT-ABSORBENT SOLUTION WHEREBY WHEN THE PRESSURE OF SAID REFRIGERANT INCREASES, SAID PISTON IS MOVED IN A DIREC-
References Cited (Backward Citations)
US1822224A
Cited
US2178561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |