Patent US3350296A successfully refreshed from Google Patents.
US3350296A
Expired / Lapsed
US
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Wax separation by countercurrent contact with an immiscible coolant
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1963-11-12
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Granted: 1967-10-31
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Expires: 1983-11-12
Abstract
No abstract record available.
Inventors
- 👤 Torobin Leonard Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:40
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009; B01D9/0059; Y; Y10; Y10S; Y10S494/00; Y10S494/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A METHOD FOR DEWAXING A PETROLEUM WITHIN A TOWER COMPRISING COUNTERCURRENTLY CONTACTING SAID FRACTION WITH A DENSER IMMISCIBLE COOLANT, SAID COOLANT BEING INTRODUCED AT ONE END OF SAID TOWER AT A TEMPERATURE BELOW THE CLOUD POINT OF THE SAID FRACTION, SAID FRACTION BEING INTRODUCED AT A TEMPERATURE ABOVE ITS CLOUD POINT INTO SAID TOWER BY SPRAYING SAID FRACTION INTO THE OTHER END OF SAID TOWER IN THE FORM OF A DENSE DISPERSION OF UNIFORM DIAMETER DROPLETS WHICH MOVE THROUGH THE TOWER AS A MOVING BED OF SPHERES PROVIDING MAXIMUM CONTACT AND EFFICIENT HEAT TRANSFER WITH SAID CONTINUOUS COOLANT PHASE, WHEREIN WAX CRYSTALS ARE GROWN AT A CONTROLLED RATE WITHIN EACH OF THE SPRAYED DROPLETS, AND REMOVING SAID CONTINUOUS COOLANT PHASE AND SAID SPRAYED DROPLETS AT THE OPPOSITE ENDS OF SAID TOWER FROM WHICH THEY WERE INTRODUCED.
Claim 2
Independent Claim
136 words
A METHOD FOR DEWAXING A PETROLEUM WITHIN A TOWER COMPRISING COUNTERCURRENTLY CONTACTING SAID FRACTION WITH A DENSER IMMISCIBLE COOLANT, SAID COOLANT BEING INTRODUCED AT ONE END OF SAID TOWER AT A TEMPERATURE BELOW THE CLOUD POINT OF THE SAID FRACTION, SAID FRACTION BEING INTRODUCED AT A TEMPERATURE ABOVE ITS CLOUD POINT INTO SAID TOWER BY SPRAYING SAID FRACTION INTO THE OTHER END OF SAID TOWER IN THE FORM OF A DENSE DISPERSION OF UNIFORM DIAMETER DROPLETS WHICH MOVE THROUGH THE TOWER AS A MOVING BED OF SPHERES PROVIDING MAXIMUM CONTACT AND EFFICIENT HEAT TRANSFER WITH SAID CONTINUOUS COOLANT PHASE, WHEREIN WAX CRYSTALS ARE GROWN AT A CONTROLLED RATE WITHIN EACH OF THE SPRAYED DROPLETS, AND REMOVING SAID CONTINUOUS COOLANT PHASE AND SAID SPRAYED DROPLETS AT THE OPPOSITE ENDS OF SAID TOWER FROM WHICH THEY WERE INTRODUCED.
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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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |