US2720980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal diffusion apparatus and method
Assignee: Standard Oil Co
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Filing: 1954-07-02
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Granted: 1955-10-18
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Expires: 1974-07-02
Abstract
No abstract record available.
Inventors
- 👤 John W Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:34
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
LIQUID THERMAL DIFFUSION APPARATUS FOR SEPARATING A LIQUID MIXTURE INTO DISSIMILAR LIQUID FRACTIONS COMPRISING TWO POROUS WALL MEMBERS CLOSELY AND SUBSTANTIALLY EQUIDISTANTLY SPACED FROM ONE ANOTHER TO FORM A NARROW SEPARATION CHAMBER, MEAN FOR INTRODUCING LIQUID MIXTURE DIRECTLY INTO SAID SEPARATION CHAMBER, FIRST AND SECOND COLLECTION CHAMBERS BEHIND SAID WALLL MEMBERS, MEANS FOR CONTINUOUSLY INTRODUCING INTO SAID FIRST COLLECTION CHAMBER A RELATIVELY HOT LIQUID FOR CONTACT HEAT EXCHANGE WITH ONE POROUS WALL MEMBER AND FOR ADMIXING WITH A FIRST FRACTION WITHDRAWN LATERALLY AND CONTINUOUSLY FROM THE SEPARATION CHAMBER THROUGH SAID ONE POROUS WALL MEMBER, MEANS FOR CONTINUOUSLY WITHDRAWING THE ADMIXED RELATIVELY HOT LIQUID AND FIRST FRACTION FROM THE FIRST COLLECTION CHAMBER, MEAN FOR CONTINUOUSLY INTRODUCING INTO THE SECOND COLLECTION CHAMBER A RELATIVELY COLD LIQUID FOR
Claim 2
Dependent Claim
125 words
LIQUID THERMAL DIFFUSION APPARATUS FOR SEPARATING A LIQUID MIXTURE INTO DISSIMILAR LIQUID FRACTIONS COMPRISING TWO POROUS WALL MEMBERS CLOSELY AND SUBSTANTIALLY EQUIDISTANTLY SPACED FROM ONE ANOTHER TO FORM A NARROW SEPARATION CHAMBER, MEAN FOR INTRODUCING LIQUID MIXTURE DIRECTLY INTO SAID SEPARATION CHAMBER, FIRST AND SECOND COLLECTION CHAMBERS BEHIND SAID WALLL MEMBERS, MEANS FOR CONTINUOUSLY INTRODUCING INTO SAID FIRST COLLECTION CHAMBER A RELATIVELY HOT LIQUID FOR CONTACT HEAT EXCHANGE WITH ONE POROUS WALL MEMBER AND FOR ADMIXING WITH A FIRST FRACTION WITHDRAWN LATERALLY AND CONTINUOUSLY FROM THE SEPARATION CHAMBER THROUGH SAID ONE POROUS WALL MEMBER, MEANS FOR CONTINUOUSLY WITHDRAWING THE ADMIXED RELATIVELY HOT LIQUID AND FIRST FRACTION FROM THE FIRST COLLECTION CHAMBER, MEAN FOR CONTINUOUSLY INTRODUCING INTO THE SECOND COLLECTION CHAMBER A RELATIVELY COLD LIQUID FOR
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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) | 1958-10-17 | 1959-04-18 | 1959-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-17 | 1963-04-18 | 1963-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-17 | 1967-04-18 | 1967-10-18 | $7700.00 | Window Closed / Lapsed |