Patent US2720975A successfully refreshed from Google Patents.
US2720975A
Expired / Lapsed
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Thermal diffusion apparatus
Assignee: Standard Oil Co
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Filing: 1952-02-27
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Granted: 1955-10-18
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Expires: 1972-02-27
Abstract
No abstract record available.
Inventors
- 👤 Jones Arthur Letcher
- 👤 Charles W Seelbach
- 👤 Frazier David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:17
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
LIQUID THERMAL DIFFUSION APPARATUS COMPRISING TWO SUBSTANTIALLY PARALLEL, LIQUID IMPERVIOUS, STATIONARY WALLS, THE OPPOSED FACES OF WHICH ARE SMOOTH AND SPACED APART A DISTANCE LESS THAN ABOUT 0.15" TO FORM A SUBSTANTIALLY UNIFORN NARROW SLIT, AN INLET COMMUNICATING WITH THE SLIT AND AT LEAST TWO OUTLETS COMMUNICATING WITH THE SLIT, WHEREIN AT LEAST ONE OF THE OUTLETS IS PROVIDED WITH AN ELONGATED OPENING IN THE FACE OF ONE OF THE WALLS, SAID OPENING HAVING A LONGITUDINAL AXIS TRANSVERSELY OF THE DIRECTION OF FLOW OF LIQUID WITHIN THE SLIT AND HAVING A WIDTH RANGING FROM ABOUT 0.005" TO A DISTANCE APPROXIMATELY EQUAL TO THE SLIT WIDTH, AND A PASSAGE FOR LIQUID EXTENDING FROM THE OPENING TO THE EXTERIOR OF THE APPARATUS.
Claim 2
Dependent Claim
120 words
LIQUID THERMAL DIFFUSION APPARATUS COMPRISING TWO SUBSTANTIALLY PARALLEL, LIQUID IMPERVIOUS, STATIONARY WALLS, THE OPPOSED FACES OF WHICH ARE SMOOTH AND SPACED APART A DISTANCE LESS THAN ABOUT 0.15" TO FORM A SUBSTANTIALLY UNIFORN NARROW SLIT, AN INLET COMMUNICATING WITH THE SLIT AND AT LEAST TWO OUTLETS COMMUNICATING WITH THE SLIT, WHEREIN AT LEAST ONE OF THE OUTLETS IS PROVIDED WITH AN ELONGATED OPENING IN THE FACE OF ONE OF THE WALLS, SAID OPENING HAVING A LONGITUDINAL AXIS TRANSVERSELY OF THE DIRECTION OF FLOW OF LIQUID WITHIN THE SLIT AND HAVING A WIDTH RANGING FROM ABOUT 0.005" TO A DISTANCE APPROXIMATELY EQUAL TO THE SLIT WIDTH, AND A PASSAGE FOR LIQUID EXTENDING FROM THE OPENING TO THE EXTERIOR OF THE APPARATUS.
References Cited (Backward Citations)
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Cited
US2161785A
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US2521112A
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US2586447A
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US2541069A
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US2541071A
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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 |