US3070965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversing heat exchange system using vented valves
Assignee: Union Carbide Corp
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Filing: 1960-04-28
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Granted: 1963-01-01
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Expires: 1980-04-28
Abstract
No abstract record available.
Inventors
- 👤 Carl P Andersen
- 👤 Flamm Alec
- 👤 Edwin L Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:50
CPC Classifications
F; F25; F25J; F25J5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/5762
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
AN APPARATUS FOR MAINTAINING PRODUCT GAS PURITY WHILE COOLING A WARM HIGHER PRESSURE FEED GAS AND WARMING A COLD LOWER PRESSURE PRODUCT GAS WHICH COMPRISES IN COMBINATION AT LEAST TWO SEPARATE REVERSIBLE HEAT EXCHANGE ZONES CONTAINING WARM AND COLD ENDS FOR SEPARATELY COOLING THE FEED GAS AND WARMING THE PRODUCT GAS; A PLURALITY OF WARM END CONDUITS CONTAINING THEREIN REVERSING VALVES FOR CONDUCTING THE WARM HIGHER PRESSURE FEED GAS TO AND THE WARMED LOWER PRESSURE PRODUCT GAS FROM, EACH HEAT EXCHANGE ZONE; A PLURALITY OF COLD END CONDUITS FOR CONDUCTING THE COOLED HIGHER PRESSURE FEED GAS FROM, AND THE COLD LOWER PRESSURE PRODUCT GAS TO EACH HEAT EXCHANGE ZONE; COLD END VALVES ARRANGED AND POSITIONED IN EACH OF SAID COLD END CONDUITS WITH HIGH AND LOW PRESSURE SIDES EACH OF SAID VALVES HAVING FEED GAS LEAKAGE CONDUIT MEANS DISPOSED BETWEEN SAID HIGH AND LOW PRESSURE SIDES OF SAID VALVES AND CONTAINING THEREIN A LOWER PRESSURE THAN THE PRESSURE ON SAID HIGH PRESSURE SIDE; CLOSURE MEANS IN SAID FEED GAS LEAKAGE CONDUIT FOR REMOVING SAID LOWER PRESSURE; CONTROL MEANS FOR OPERATING SAID
Claim 2
Independent Claim
181 words
AN APPARATUS FOR MAINTAINING PRODUCT GAS PURITY WHILE COOLING A WARM HIGHER PRESSURE FEED GAS AND WARMING A COLD LOWER PRESSURE PRODUCT GAS WHICH COMPRISES IN COMBINATION AT LEAST TWO SEPARATE REVERSIBLE HEAT EXCHANGE ZONES CONTAINING WARM AND COLD ENDS FOR SEPARATELY COOLING THE FEED GAS AND WARMING THE PRODUCT GAS; A PLURALITY OF WARM END CONDUITS CONTAINING THEREIN REVERSING VALVES FOR CONDUCTING THE WARM HIGHER PRESSURE FEED GAS TO AND THE WARMED LOWER PRESSURE PRODUCT GAS FROM, EACH HEAT EXCHANGE ZONE; A PLURALITY OF COLD END CONDUITS FOR CONDUCTING THE COOLED HIGHER PRESSURE FEED GAS FROM, AND THE COLD LOWER PRESSURE PRODUCT GAS TO EACH HEAT EXCHANGE ZONE; COLD END VALVES ARRANGED AND POSITIONED IN EACH OF SAID COLD END CONDUITS WITH HIGH AND LOW PRESSURE SIDES EACH OF SAID VALVES HAVING FEED GAS LEAKAGE CONDUIT MEANS DISPOSED BETWEEN SAID HIGH AND LOW PRESSURE SIDES OF SAID VALVES AND CONTAINING THEREIN A LOWER PRESSURE THAN THE PRESSURE ON SAID HIGH PRESSURE SIDE; CLOSURE MEANS IN SAID FEED GAS LEAKAGE CONDUIT FOR REMOVING SAID LOWER PRESSURE; CONTROL MEANS FOR OPERATING SAID
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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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |