US2723033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid thermal diffusion method
Assignee: Standard Oil Co
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Filing: 1952-02-12
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Granted: 1955-11-08
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Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 Jones Arthur Letcher
- 👤 Philip S Fay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:14
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A PROCESS FOR CONTINUOUSLY SEPARATING, BY THERMAL DIFFUSION, TWO FRACTIONS CONTAINING DISSIMILAR MATERIALS THAT ARE NORMALLY LIQUID UNDER THE CONDITIONS OF SEPARATION AND WHICH ARE INCLUDED IN A MIXTURE NORMALLY LIQUID UNDER THE CONDITIONS OF SEPARATION, THE IMPROVEMENT WHICH COMPRISES FORMING A SUBSTANTIALLY HORIZONTAL, CONTINUOUS AND SHALLOW STREAM OF LIQUID HAVING A DEPTH LESS THAN ABOUT 0.15 INCH AND DEFINED BY SMOOTH, UPPER AND LOWER, CLOSELY SPACED, MUTUALLY PARALLEL AND OPPOSED WALLS OF INERT, HEAT CONDUCTIVE MATERIAL; CONTINUOUSLY INTRODUCING THE LIQUID MIXTURE INTO THE STREAM AT ONE END THEREOF; MAINTAINING A TEMPERATURE GRADIENT ACROSS THE STREAM TO CONCENTRATE A FIRST CONTINUOUSLY MOVING FRACTION ENRICHED IN ONE COMPONENT OF THE MIXTURE ADJACENT ONE OF THE WALLS AND TO CONCENTRATE THE SECOND FRACTION, MOVING CONCURRENTLY WITH THE FIRST FRACTION AND IMPOVERISHED IN SAID ONE COMPONENT ADJACENT THE OTHER OF THE OPPOSED WALLS; AND CONTINUOUSLY AND SEPARATELY REMOVING THE TWO FRACTIONS FROM THE STREAM AT THE OTHER END.
Claim 2
Dependent Claim
156 words
IN A PROCESS FOR CONTINUOUSLY SEPARATING, BY THERMAL DIFFUSION, TWO FRACTIONS CONTAINING DISSIMILAR MATERIALS THAT ARE NORMALLY LIQUID UNDER THE CONDITIONS OF SEPARATION AND WHICH ARE INCLUDED IN A MIXTURE NORMALLY LIQUID UNDER THE CONDITIONS OF SEPARATION, THE IMPROVEMENT WHICH COMPRISES FORMING A SUBSTANTIALLY HORIZONTAL, CONTINUOUS AND SHALLOW STREAM OF LIQUID HAVING A DEPTH LESS THAN ABOUT 0.15 INCH AND DEFINED BY SMOOTH, UPPER AND LOWER, CLOSELY SPACED, MUTUALLY PARALLEL AND OPPOSED WALLS OF INERT, HEAT CONDUCTIVE MATERIAL; CONTINUOUSLY INTRODUCING THE LIQUID MIXTURE INTO THE STREAM AT ONE END THEREOF; MAINTAINING A TEMPERATURE GRADIENT ACROSS THE STREAM TO CONCENTRATE A FIRST CONTINUOUSLY MOVING FRACTION ENRICHED IN ONE COMPONENT OF THE MIXTURE ADJACENT ONE OF THE WALLS AND TO CONCENTRATE THE SECOND FRACTION, MOVING CONCURRENTLY WITH THE FIRST FRACTION AND IMPOVERISHED IN SAID ONE COMPONENT ADJACENT THE OTHER OF THE OPPOSED WALLS; AND CONTINUOUSLY AND SEPARATELY REMOVING THE TWO FRACTIONS FROM THE STREAM AT THE OTHER END.
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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |