US2708571A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for contacting gases and liquids
Assignee: Industrikemiska AB
•
Filing: 1951-05-29
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Granted: 1955-05-17
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Fischerstrom Nils Claes Hugo
- 👤 Ingmar S Gullstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:33
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; B; B01; B01F; B01F23/00; B01F23/20; B01F23/23; B01F23/232; B01F23/2323; B01F23/23231; B01F23/232312; B01F23/231; B01F23/23105; B01F23/2311; B01F23/23113; B01F23/2312; B01F23/23126; B01F23/231265; Y; Y02; Y02W; Y02W10/00; Y02W10/10; Y10; Y10S; Y10S261/00; Y10S261/75
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
APPARATUS FOR AERATING SEWAGE COMPRISING A CONTAINER HAVING A BOTTOM AND SIDE WALLS, AN IMPERVIOUS PARTITION WALL IN SAID CONTAINER DIVIDING THE LATTER INTO TWO VERTICAL COMPARTMENTS, COMMUNICATION PASSAGES BETWEEN SAID COMPARTMENTS AT THE TOP AND AT THE BOTTOM AND ALONG THE ENTIRE LENGTH OF SAID PARTITION WALL, A SUBSTANTIALLY HORIZONTAL SYSTEM OF A PLURALITY OF SPACED GAS DISTRIBUTION PIPES IN AND SUBSTANTIALLY EVENLY DISTRIBUTED OVER THE ENTIRE CROSS-SECTION OF THE ONE OF SAID COMPARTMENTS, SAID PARTITION WALL BEING SO POSITIONED RELATIVE TO SAID BOTTOM AND SIDEWALLS THAT THE LIQUID AS A RESULT OF THE INTRODUCTION OF GAS THROUGH SAID PIPES WILL FLOW SUBSTANTIALLY ONLY UPWARDS IN THE COMPARTMENT INTO WHICH GAS IS INTRODUCED AND SUBSTANTIALLY ONLY DOWNWARDS IN THE OTHER COMPARTMENT.
Claim 2
Dependent Claim
122 words
APPARATUS FOR AERATING SEWAGE COMPRISING A CONTAINER HAVING A BOTTOM AND SIDE WALLS, AN IMPERVIOUS PARTITION WALL IN SAID CONTAINER DIVIDING THE LATTER INTO TWO VERTICAL COMPARTMENTS, COMMUNICATION PASSAGES BETWEEN SAID COMPARTMENTS AT THE TOP AND AT THE BOTTOM AND ALONG THE ENTIRE LENGTH OF SAID PARTITION WALL, A SUBSTANTIALLY HORIZONTAL SYSTEM OF A PLURALITY OF SPACED GAS DISTRIBUTION PIPES IN AND SUBSTANTIALLY EVENLY DISTRIBUTED OVER THE ENTIRE CROSS-SECTION OF THE ONE OF SAID COMPARTMENTS, SAID PARTITION WALL BEING SO POSITIONED RELATIVE TO SAID BOTTOM AND SIDEWALLS THAT THE LIQUID AS A RESULT OF THE INTRODUCTION OF GAS THROUGH SAID PIPES WILL FLOW SUBSTANTIALLY ONLY UPWARDS IN THE COMPARTMENT INTO WHICH GAS IS INTRODUCED AND SUBSTANTIALLY ONLY DOWNWARDS IN THE OTHER COMPARTMENT.
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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) | 1958-05-16 | 1958-11-15 | 1959-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-16 | 1962-11-15 | 1963-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-16 | 1966-11-15 | 1967-05-17 | $7700.00 | Window Closed / Lapsed |