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US3794705A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for removal of fluidized bed particles from extruded polymeric products processed therein

Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1972-09-13
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Granted: 1974-02-26
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Expires: 1992-09-13
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Abstract

Abstract IN PROCESSING, I.E., HEATING, COOLING, OR VULCANIZING, ESTRUDED POLYMERIC PRODUCTS IN FLUIDIZED BEDS, PARTICLES FROM THE BED STICK TO THE SURFACE OF THE PRODUCT. THESE PARTICLES CAUSE PROBLEMS IN SUBSEQUENT HANDLING AND FINISHING. PRESENT METHOD OF REMOVING THESE ADHERED PARTICLES INCLLUDE AIR BLASTING, RUBBING, AND BRUSHING THE SURFACE; RUBBING AND BRUSHING DAMAGE THE PRDUCT''S SURFACE WHEREAS AIR IS RATHER INEFFICIENT AND CAUSES CONTAMINATION OF THE BED. THIS INVENTION PROVIDES AN EFFICIENT PROCESS FOR REMOVING THE PARTICLES AND THAT DOES NOT DAMAGE THE SURFACE OT THE PRODUCT OF AN ELECTRIC FLUID SUCH AS AIR AND 25* TO 30* A STREAM OF AN ELASTIC FLUID SUCH AS AIR AND FLUIDIZED BED PARTICLES AGAINST THE SURFACE OF THE ONCOMING EXTRUDED PRODUCT.

Inventors

  • 👤 R Harley

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 11:49
CPC Classifications
D; D01; D01D; D01D11/00; B; B24; B24C; B24C3/00; B24C3/08; B24C3/10; B24C3/12; B29; B29C; B29C48/00; B29C48/03; B29C48/06; B29C48/25; B29C48/88; B29C48/885; B29C48/919; B29C71/00; B29C71/009; Y; Y10; Y10S; Y10S264/00; Y10S264/51; Y10S425/00; Y10S425/02

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) 1977-02-25 1977-08-27 1978-02-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-25 1981-08-27 1982-02-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-25 1985-08-27 1986-02-26 $7700.00 Window Closed / Lapsed

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