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US3706538A Expired / Lapsed US ⏱️ 0.0 years remaining

Smoke abatement apparatus

Assignee: FRANK D CHEW
•
Filing: 1970-12-23
•
Granted: 1972-12-19
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Expires: 1990-12-23
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Abstract

Abstract A SMOKE ABATEMENT APPARATUS AND METHOD WHEREIN SMOKE IS INTRODUCED INTO THE INLET OF A CONVERGING DIVERGING VENTURI WHILE A NOZZLE EMITS A HIGH VELOCITY JET STREAM OF WETTING FLUID INTO THE CONVERGING INLET OF SAID VENTURI TO ASPIRATE AND SCRUB SAID SMOKE FOR EMULSIFYING IT DURING PASSAGE THROUGH SAID VENTURI; AND WHEREIN A TANK COMMUNICATES WITH THE DIVERGING OUTLET OF SAID VENTURI TO COLLECT EMULSIFIED MATERIALS FROM SAID SMOKE; SAID VENTURI AND SAID TANK BEING PROVIDED WITH A LEAD INTERIOR TO RESIST CORROSIVE ELEMENTS OF SAID SMOKE; SAID APPARATUS ALSO INCLUDING MEANS FOR ADMITTING ACIDIC OR BASE MATERIALS, TOGETHER WITH A FOAMING AGENT INTO SAID TANK, FOR REACTION WITH SAID BASE OR ACID MATERIALS OF SAID SMOKE, SAID FOAMING AGENT ALSO TENDING TO COLLECT NON-CONDENSABLES AND/OR NON-SOLUBLE MATERIAL FROM SAID SMOKE; EXHAUST PUMP MEANS FOR REMOVING SAID NON-CONDENSABLE AND NON-SOLUBLE MATERIALS FROMED SAID TANK; AND ANOTHER MEANS ADAPTED AND DISPOSED FOR PUMPING EMULSIFIED MATERIAL AND FLUID FROM A LOWER SUMP PORTION OF SAID TANK.

Inventors

  • 👤 Frank D Chew

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 20:52
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/10; Y; Y10; Y10S; Y10S261/00; Y10S261/54

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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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) 1975-12-19 1976-06-19 1976-12-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-12-19 1980-06-19 1980-12-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-12-19 1984-06-19 1984-12-19 $7700.00 Window Closed / Lapsed

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