US3143397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling tower
Assignee: California Press Manuf Co
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Filing: 1959-11-17
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Granted: 1964-08-04
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Expires: 1979-11-17
Abstract
No abstract record available.
Inventors
- 👤 James T Keefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:11
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
A TOWER FEOR THE TREATMENT OF MATERIAL SUCH AS PELLETS OR THE LIKE COMPRISING A BASE SECTION HAVING A DISCHARGE OPENING THERFROM; SPACED END WALLS RISING FROM SAID BASE SECTION AND JOINED BY SPACED OUTSIDE WALLS HAVING AIR INTAKE OPENINGS DISTRIBUTED THEREOVER; A PAIR OF INSIDE SPACED LOUVRE WALL ASSEMBLIES EXTENDING BETWEEN SAID END WALLS AND DEFINEING BETWEEN THEM, AN AIR WITHDRAWAL CHAMBER WITHIN SAID TOWER, EACH LOUVRE WALL ASSEMBLY BEING NORMALLY CLOSED BUTY ADAPTED TO PROGRESSIVELY OPEN FROM THE BOTTOM UP, AS MATERIAL PILES UP AGAINST SAID LOUVRE WALL ASSEMBLY; AND MEANS SPANNING THE UPPER ENDS OF SAID SPACED LOUVRE WALL ASSEMBLIES TO CLOSE SAID AIR WITHDRAWAL CHAMBER AT ITS UPPER END AND CREATE A PAIR OF COLUMNS IN SAID TOWER FOR FLOW OF MATERIAL TO BE TREATED.
Claim 2
Dependent Claim
129 words
A TOWER FEOR THE TREATMENT OF MATERIAL SUCH AS PELLETS OR THE LIKE COMPRISING A BASE SECTION HAVING A DISCHARGE OPENING THERFROM; SPACED END WALLS RISING FROM SAID BASE SECTION AND JOINED BY SPACED OUTSIDE WALLS HAVING AIR INTAKE OPENINGS DISTRIBUTED THEREOVER; A PAIR OF INSIDE SPACED LOUVRE WALL ASSEMBLIES EXTENDING BETWEEN SAID END WALLS AND DEFINEING BETWEEN THEM, AN AIR WITHDRAWAL CHAMBER WITHIN SAID TOWER, EACH LOUVRE WALL ASSEMBLY BEING NORMALLY CLOSED BUTY ADAPTED TO PROGRESSIVELY OPEN FROM THE BOTTOM UP, AS MATERIAL PILES UP AGAINST SAID LOUVRE WALL ASSEMBLY; AND MEANS SPANNING THE UPPER ENDS OF SAID SPACED LOUVRE WALL ASSEMBLIES TO CLOSE SAID AIR WITHDRAWAL CHAMBER AT ITS UPPER END AND CREATE A PAIR OF COLUMNS IN SAID TOWER FOR FLOW OF MATERIAL TO BE TREATED.
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) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |