Patent US3324673A successfully refreshed from Google Patents.
US3324673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system with check valve
Assignee: Universal American Corp
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Filing: 1965-07-19
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Granted: 1967-06-13
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Expires: 1985-07-19
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Lindahl
- 👤 Jay F Falke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:07
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/20; Y; Y10; Y10S; Y10S62/00; Y10S62/17; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A REFRIGERATION SYSTEM INCLUDING A RECEIVER FOR REFRIGERANT, AN EXPANSION VALVE, AN EVAPORATOR, A COMPRESSOR AND A CONDENSER CONNECTED IN SERIES IN A CLOSED REFRIGERATION SYSTEM, A PRESSURE REGULATED VALVE POSITIONED BETWEEN THE CONDENSER AND RECEIVER FOR REGULATED FLOODING OF THE CONDENSER, A BYPASS LINE BETWEEN THE COMPRESSOR AND RECEIVER FOR BYPASSING REFRIGERANT FROM THE COMPRESSOR OUTPUT TO THE RECEIVER TO MAINTAIN PRESSURE IN THE RECEIVER AND A CHECK VALVE IN THE BYPASS LINE INCLUDING A HOLLOW VALVE HOUSING HAVING SPACED APART INLET AND
Claim 2
Dependent Claim
84 words
A REFRIGERATION SYSTEM INCLUDING A RECEIVER FOR REFRIGERANT, AN EXPANSION VALVE, AN EVAPORATOR, A COMPRESSOR AND A CONDENSER CONNECTED IN SERIES IN A CLOSED REFRIGERATION SYSTEM, A PRESSURE REGULATED VALVE POSITIONED BETWEEN THE CONDENSER AND RECEIVER FOR REGULATED FLOODING OF THE CONDENSER, A BYPASS LINE BETWEEN THE COMPRESSOR AND RECEIVER FOR BYPASSING REFRIGERANT FROM THE COMPRESSOR OUTPUT TO THE RECEIVER TO MAINTAIN PRESSURE IN THE RECEIVER AND A CHECK VALVE IN THE BYPASS LINE INCLUDING A HOLLOW VALVE HOUSING HAVING SPACED APART INLET AND
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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |