US2723758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal diffusion apparatus
Assignee: Standard Oil Co
•
Filing: 1952-01-24
•
Granted: 1955-11-15
•
Expires: 1972-01-24
Abstract
No abstract record available.
Inventors
- 👤 George L Lupfer
- 👤 Ralph G Atkinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:23
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
LIQUID THERMAL DIFFUSION APPARATUS COMPRISING TWO SUBSTANTIALLY VERTICAL, LIQUID IMPERVIOUS WALLS SUBSTANTIALLY EQUIDISTANTLY SPACED FROM ONE ANOTHER TO FORM A NARROW VERTICAL SLIT, MEANS FOR RELATIVELY HEATING AND COOLING THE WALLS TO MAINTAIN A TEMPERATURE GRADIENT ACROSS THE SLIT, AT BOTH THE UPPER AND LOWER ENDS OF THE SLIT, OUTLETS AT BOTH THE UPPER AND LOWER ENDS OF THE SLIT. FIRST LIQUID FLOW-DIRECTING MEANS BETWEEN THE INLET AND OUTLET AT THE UPPER END OF THE SLIT FOR DIRECTING THE FLOW OF LIQUID DOWNWARDLY ALONG THE RELATIVELY COOLED WALL OF THE SLIT, DOWNWARDLY ALONG THE RELATIVELY COOLED WALL OF THE SLIT, AND SECOND LIQUID FLOW-DIRECTING MEANS BETWEEN THE INLET AND OUTLET AT THE LOWER END OF THE SLIT FOR DIRECTING THE FLOW OF LIQUID MIXTURE INTRODUCED INTO THE SLIT THROUGH SAID LOWER INLET UPWARDLY ALONG THE RELATIVELY HEATED WALL OF THE SLIT.
Claim 2
Dependent Claim
141 words
LIQUID THERMAL DIFFUSION APPARATUS COMPRISING TWO SUBSTANTIALLY VERTICAL, LIQUID IMPERVIOUS WALLS SUBSTANTIALLY EQUIDISTANTLY SPACED FROM ONE ANOTHER TO FORM A NARROW VERTICAL SLIT, MEANS FOR RELATIVELY HEATING AND COOLING THE WALLS TO MAINTAIN A TEMPERATURE GRADIENT ACROSS THE SLIT, AT BOTH THE UPPER AND LOWER ENDS OF THE SLIT, OUTLETS AT BOTH THE UPPER AND LOWER ENDS OF THE SLIT. FIRST LIQUID FLOW-DIRECTING MEANS BETWEEN THE INLET AND OUTLET AT THE UPPER END OF THE SLIT FOR DIRECTING THE FLOW OF LIQUID DOWNWARDLY ALONG THE RELATIVELY COOLED WALL OF THE SLIT, DOWNWARDLY ALONG THE RELATIVELY COOLED WALL OF THE SLIT, AND SECOND LIQUID FLOW-DIRECTING MEANS BETWEEN THE INLET AND OUTLET AT THE LOWER END OF THE SLIT FOR DIRECTING THE FLOW OF LIQUID MIXTURE INTRODUCED INTO THE SLIT THROUGH SAID LOWER INLET UPWARDLY ALONG THE RELATIVELY HEATED WALL OF THE SLIT.
References Cited (Backward Citations)
US2075353A
Cited
US2158238A
Cited
US2390115A
Cited
US2521112A
Cited
US2541069A
Cited
US2541071A
Cited
US2585244A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |