Freezing system
Abstract
Abstract A FREEZING SYSTEM COMPRISING MEANS PROVIDING A CHAMBER, A PLATE FOR SUPPORTING ARTICLES TO BE FROZEN DISPOSED IN THE CHAMBER, MEANS FOR LOWERING THE TEMPERATURE OF THE PLATE, FIRST CONDUIT MEANS FOR CONNECTING THE CHAMBER TO A SOURCE OF REFRIGERANT, SUCH AS LIQUID NITROGEN, AND MEANS FOR CIRCULATING SUCH A REFRIGERANT IN SAID CHAMBER AND ABOUT THE ARTICLES SUPPORTED ON THE PLATE. IN THE PREFFERED EMBODIMENT, THE MEANS FOR LOWERING THE TEMPERATURE OF THE PLATE INCLUDES A CLOSED-CIRCUIT REFRIGERATION SYSTEM HAVING PASSAGEWAYS DISPOSED IN HEAT-CONDUCTING RELATIONSHIP TO THE PLATE AND ADDITIONAL PASSAGEWAYS, AND A HEAT EXCHANGER DISPOSED IN HEAT-CONDUCTING RELATIONSHIP TO THE SAID ADDITIONAL PASSAGEWAYS. THE HEAT EXCHANGER IS PROVIDED WITH AN INPUT PORT AND AN EXIT PORT, AND THE SAID FIRST CONDUIT MEANS INCLUDES MEANS FOR CONNECTING THE INPUT PORT TO SUCH A REFRIGERNAT SOURCE AND THE EXIT PORT TO THE CHAMBER, WHEREBY THE REFRIGERANT TO BE EXHAUSTED INTO THE CHAMBER IS FIRST CIRCULATED THROUGH THE HEAT EXCHANGER IN HEAT-CONDUCTING RELATIONSHIP TO THE SAID ADDITIONAL PASSAGEWAYS OF THE CLOSED CIRCUIT REFRIGERATION SYSTEM.
Inventors
- 👤 Alfred H Schlemmer
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |