Patent US3177930A successfully refreshed from Google Patents.
US3177930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system
Assignee: Arkla Industries Inc
•
Filing: 1960-09-26
•
Granted: 1965-04-13
•
Expires: 1980-09-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Philip P Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:42
CPC Classifications
F; F25; F25B; F25B15/00; F25B15/02; F25B15/06; F25B29/00; F25B29/006; F25B2315/00; F25B2315/001; Y; Y02; Y02A; Y02A30/00; Y02A30/27; Y02B; Y02B30/00; Y02B30/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN AN ABSORPTION REFRIGERATION APPARATUS OF THE TWOPRESSURE TYPE HAVING A PLURALITY OF PARTS INCLUDING A GENERATOR, A CONDENSER, AN EVAPORATOR AND AN ABSORBER INTERCONNECTED TO FORM A SYSTEM FOR CIRCULATION OF A REFRIGERANT AND A ABSORPTION SOLUTION, THE IMPROVEMENT WHICH COMPRISES: AN ABSORPTION SOLUTION CONCENTRATION CONTROL ARRANGEMENT CONNECTED TO SAID APPARATUS AND ARRANGED TO WITHDRAW SOME LIQUID REFRIGERANT FROM THE NORMAL REFRIGERANT FLOW CIRCUIT DURING PERIODS OF OPERATION OF THE APPARATUS AND TO RETAIN SUCH WITHDRAWN LIQUID OUT OF THE NORMAL REFRIGERANT FLOW CIRCUIT DURING PERIODS WHEN THE APPARATUS IS NOT OPERATING, SAID CONCENTRATION CONTROL ARRANGEMENT INCLUDING MEANS FOR VARYING THE AMOUNT OF LIQUID REFRIGERANT WITHDRAWN DIRECTLY IN ACCORDANCE WITH THE CONDENSER PRESSURE.
Claim 2
Dependent Claim
114 words
IN AN ABSORPTION REFRIGERATION APPARATUS OF THE TWOPRESSURE TYPE HAVING A PLURALITY OF PARTS INCLUDING A GENERATOR, A CONDENSER, AN EVAPORATOR AND AN ABSORBER INTERCONNECTED TO FORM A SYSTEM FOR CIRCULATION OF A REFRIGERANT AND A ABSORPTION SOLUTION, THE IMPROVEMENT WHICH COMPRISES: AN ABSORPTION SOLUTION CONCENTRATION CONTROL ARRANGEMENT CONNECTED TO SAID APPARATUS AND ARRANGED TO WITHDRAW SOME LIQUID REFRIGERANT FROM THE NORMAL REFRIGERANT FLOW CIRCUIT DURING PERIODS OF OPERATION OF THE APPARATUS AND TO RETAIN SUCH WITHDRAWN LIQUID OUT OF THE NORMAL REFRIGERANT FLOW CIRCUIT DURING PERIODS WHEN THE APPARATUS IS NOT OPERATING, SAID CONCENTRATION CONTROL ARRANGEMENT INCLUDING MEANS FOR VARYING THE AMOUNT OF LIQUID REFRIGERANT WITHDRAWN DIRECTLY IN ACCORDANCE WITH THE CONDENSER PRESSURE.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |