Patent US3848038A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3848038A Expired / Lapsed US ⏱️ 0.0 years remaining

Drying expanded plastic with microwave energy

Assignee: Raytheon Co
•
Filing: 1973-06-04
•
Granted: 1974-11-12
•
Expires: 1993-06-04
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract 1. A METHOD OF PROCESSING EXPANDABLE PLASTIC MATERIAL PRINCIPALLY OF A POLYSTYRENE COMPOSITION COMPRISING THE STEPS OF: MIXING MICROWAVE ENERGY ABSORBING MATERIAL SELECTED FROM THE GROUP INCLUDING CARBON, GRAPHITE, MAGNETITE, BARIUM TITANATE AND LOSSY FERRITES WITH SAID PLALSTIC MATERIAL, PLACING SAID MIXED PLASTIC AND ADDITIVE MATERIALS IN A MOLD TO PROVIDE THE DESIRED EXPANDED OBJECT CONFIGURATION, HEATING SAID MOLD BY A MOISTURE LADEN ATMOSPHERE TO CAUSE EXPANSION OF SAID MATERIAL WITHIN SAID MOLD, REMOVAL OF SAID EXPANDED FOAMED PLASTIC MATERIAL OBJECT FROM SAID MOLD, RADIATING SAID REMOVED EXPANDED FOAMED PLASTIC MATERIAL OBJECT WITH MICROWAVE ENERGY A SUFFICIENT TIME TO DIFFUSE RESIDUAL INTERSTITIAL MOISTURE TO THE SURFACE, AND SIMULTANEOUSLY CIRCULATING A DRYING MEDIUM OVER SAID OBJECT TO REMOVE SUBSTANTIALLY ALL OF THE SURFACED MOISTURE.

Inventors

  • 👤 E Dench

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 10:35
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/36; C08K; C08K3/00; C08K3/02; C08K3/04; C08K3/18; C08K3/24; C08K3/26; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; Y; Y10; Y10S; Y10S264/00; Y10S264/17

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 122 words
A METHOD OF PROCESSING EXPANDABLE PLASTIC MATERIAL PRINCIPALLY OF A POLYSTYRENE COMPOSITION COMPRISING THE STEPS OF: MIXING MICROWAVE ENERGY ABSORBING MATERIAL SELECTED FROM THE GROUP INCLUDING CARBON, GRAPHITE, MAGNETITE, BARIUM TITANATE AND LOSSY FERRITES WITH SAID PLALSTIC MATERIAL, PLACING SAID MIXED PLASTIC AND ADDITIVE MATERIALS IN A MOLD TO PROVIDE THE DESIRED EXPANDED OBJECT CONFIGURATION, HEATING SAID MOLD BY A MOISTURE LADEN ATMOSPHERE TO CAUSE EXPANSION OF SAID MATERIAL WITHIN SAID MOLD, REMOVAL OF SAID EXPANDED FOAMED PLASTIC MATERIAL OBJECT FROM SAID MOLD, RADIATING SAID REMOVED EXPANDED FOAMED PLASTIC MATERIAL OBJECT WITH MICROWAVE ENERGY A SUFFICIENT TIME TO DIFFUSE RESIDUAL INTERSTITIAL MOISTURE TO THE SURFACE, AND SIMULTANEOUSLY CIRCULATING A DRYING MEDIUM OVER SAID OBJECT TO REMOVE SUBSTANTIALLY ALL OF THE SURFACED MOISTURE.
Claim 2
Independent Claim 122 words
A METHOD OF PROCESSING EXPANDABLE PLASTIC MATERIAL PRINCIPALLY OF A POLYSTYRENE COMPOSITION COMPRISING THE STEPS OF: MIXING MICROWAVE ENERGY ABSORBING MATERIAL SELECTED FROM THE GROUP INCLUDING CARBON, GRAPHITE, MAGNETITE, BARIUM TITANATE AND LOSSY FERRITES WITH SAID PLALSTIC MATERIAL, PLACING SAID MIXED PLASTIC AND ADDITIVE MATERIALS IN A MOLD TO PROVIDE THE DESIRED EXPANDED OBJECT CONFIGURATION, HEATING SAID MOLD BY A MOISTURE LADEN ATMOSPHERE TO CAUSE EXPANSION OF SAID MATERIAL WITHIN SAID MOLD, REMOVAL OF SAID EXPANDED FOAMED PLASTIC MATERIAL OBJECT FROM SAID MOLD, RADIATING SAID REMOVED EXPANDED FOAMED PLASTIC MATERIAL OBJECT WITH MICROWAVE ENERGY A SUFFICIENT TIME TO DIFFUSE RESIDUAL INTERSTITIAL MOISTURE TO THE SURFACE, AND SIMULTANEOUSLY CIRCULATING A DRYING MEDIUM OVER SAID OBJECT TO REMOVE SUBSTANTIALLY ALL OF THE SURFACED MOISTURE.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-11-11 1978-05-13 1978-11-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-11 1982-05-13 1982-11-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-11 1986-05-13 1986-11-12 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag