Patent US3443391A successfully refreshed from Google Patents.
US3443391A
Expired / Lapsed
US
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Wax crystallization employing propane refrigerant
Assignee: Phillips Petroleum Co
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Filing: 1966-09-26
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Granted: 1969-05-13
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Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Storment
- 👤 Charley S Jones
- 👤 Norman G Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:58
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009; B01D9/0059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A METHOD OF CHILLING A LIQUID MIXTURE COMPRISING THE STEPS OF: CHARGING A FIRST AMOUNT OF MIXTURE TO A PRELIMINARY CHILLING ZONE; CHILLING THE MIXTURE IN SAID PRELIMINARY ZONE TO AN INTERMEDIATE TEMPERATURE BY EVAPORIZATION OF A VOLATILE COMPONENT; TRANSFERRING VOLATILE COMPONENT VAPORS FRO SAID PRELIMINARY ZONE TO A LOWER PRESSURE PRIMARY CHILLING ZONE, THEREBY REDUCING THE TEMPERATURE DIFFERENTIAL BETWEEN SAID PRELIMINARY ZONE AND SAID PRIMARY ZONE; TRANSFERRING LIQUID MIXTURE FROM SAID PRELIMINARY ZONE TO SAID PRIMARY ZONE WHEN SAID TEMPERATURE DIFFERENTIAL HAS REACHED A DESIRABLE LOW VALUE; CHILLING THE LIQUID IN SAID PRIMARY ZONE TO A DESIRED TEMPERATURE TO ACCOMPLISH A DESIRED CRYSTALLIZATION; DISCHARGING THE CHILLED LIQUID CONTAINING A CRYTALLIZED COMPONENT TO AN ACCUMULATION ZONE; AND REPEATING THE ABOVE STEPS IN SAID FIRST PRELIMINARY ZONE AND SAID FIRST PRIMARY ZONE.
Claim 2
Independent Claim
131 words
A METHOD OF CHILLING A LIQUID MIXTURE COMPRISING THE STEPS OF: CHARGING A FIRST AMOUNT OF MIXTURE TO A PRELIMINARY CHILLING ZONE; CHILLING THE MIXTURE IN SAID PRELIMINARY ZONE TO AN INTERMEDIATE TEMPERATURE BY EVAPORIZATION OF A VOLATILE COMPONENT; TRANSFERRING VOLATILE COMPONENT VAPORS FRO SAID PRELIMINARY ZONE TO A LOWER PRESSURE PRIMARY CHILLING ZONE, THEREBY REDUCING THE TEMPERATURE DIFFERENTIAL BETWEEN SAID PRELIMINARY ZONE AND SAID PRIMARY ZONE; TRANSFERRING LIQUID MIXTURE FROM SAID PRELIMINARY ZONE TO SAID PRIMARY ZONE WHEN SAID TEMPERATURE DIFFERENTIAL HAS REACHED A DESIRABLE LOW VALUE; CHILLING THE LIQUID IN SAID PRIMARY ZONE TO A DESIRED TEMPERATURE TO ACCOMPLISH A DESIRED CRYSTALLIZATION; DISCHARGING THE CHILLED LIQUID CONTAINING A CRYTALLIZED COMPONENT TO AN ACCUMULATION ZONE; AND REPEATING THE ABOVE STEPS IN SAID FIRST PRELIMINARY ZONE AND SAID FIRST PRIMARY ZONE.
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) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |