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Patent US2794728A successfully refreshed from Google Patents.
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US2794728A Expired / Lapsed US ⏱️ 0.0 years remaining

Process of making a flowable solid ore-carbon mass

Assignee: Lesher and Associates Inc
•
Filing: 1953-05-14
•
Granted: 1957-06-04
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Expires: 1973-05-14
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Abstract

No abstract record available.

Inventors

  • 👤 Carl E Lesher

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 16:22
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/216

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 251 words
A PROCESS OF MAKING A FLOWABLE MASS OF FINE DISCRETE SOLIDS LARGELY MADE UP OF PARTICLES OF CARBONACEOUS MATERIAL AND PARTICLES OF MATERIAL WHIHC IS PREDOMINANTLY ORE ADHERENTLY CONNECTED TOGETHER COMPRISING PREHEATING FINELY DIVIDED MATERIAL WHICH IS PREDOMINANTLY ORE TO A TMEPERATURE ABOVE THE SOFTENING TEMPERATURE OF THE HEREINAFTER MENTIONED FINELY DIVIDED COKING CARBONACEOUS MATERIAL IN SOLID FORM, ADMIXING IN A MIXER THE PREHEATED MATERIAL WHICH IS PREDOMINANTLY ORE AND FINELY DIVIDED COKING CARBONACEOUS MATERIAL IN SOLID FORM, COMPLETING THE ADMIXING IN THE MIXER BEFORE THE FINELY DIVIDED CARBONACEOUS MATERIAL EXCEEDS A TEMPERATURE OF ABOUT 600* 650* F. AND MAINTINING THE SAME ADMIXED AS THE TEMPERATURE RISES UNTIL THE TEMPERATURE OF THE CARBONACEOUS MATERIAL APPROACHES ITS SOFTENING TEMPERATURE, THEN DISCHARGING THE MIXTURE FROM THE MIXER INTO A ROTATING RETORT WHEREIN THE MIXTURE IS AGITATED AND ADDING FURTHER HEAT TO THE MIXTURE THROUGH THE WALL OF THE RETORT SO THAT THE CARBONACEOUS MATERIAL SOFTENS AND BECOMES STICKY WHILE IN INTIMATE CONTACT WITH THE FINELY DIVIDED MATERIAL WHICH IS PREDOMINANTLY ORE, OBVIATING ANY TENDENCY OF THE RESPECTIVE MATERIALS TO SEGREGATE DURING AGITATION DECAUSE OF A DIFFERENT IN SPECIFIC GRAVITY, THE AGITATION CAUSING PARTICLES OF THE CARBONACEOUS MATERIAL AND PARTICLES OF THE MATERIAL WHICH IS PREDOMINANTLY ORE TO BECOME ADHERENTLY CONNECTED TOGETHER AS FINE SOLIDS FORMING A FLOWABLE MASS, AND CONTINUING THE HEATING AND AGITATION OF THE MIXTURE UNTIL THE MIXTURE ATTAINS A TEMPERATURE OF AT LEAST 850* F. BUT NOT SUBSTANTIALLY HIGHER THAN 1000* F. AND THE CARBONACEOUS MATERIAL RETURNS TO SOLID FORM.
Claim 2
Dependent Claim 251 words
A PROCESS OF MAKING A FLOWABLE MASS OF FINE DISCRETE SOLIDS LARGELY MADE UP OF PARTICLES OF CARBONACEOUS MATERIAL AND PARTICLES OF MATERIAL WHIHC IS PREDOMINANTLY ORE ADHERENTLY CONNECTED TOGETHER COMPRISING PREHEATING FINELY DIVIDED MATERIAL WHICH IS PREDOMINANTLY ORE TO A TMEPERATURE ABOVE THE SOFTENING TEMPERATURE OF THE HEREINAFTER MENTIONED FINELY DIVIDED COKING CARBONACEOUS MATERIAL IN SOLID FORM, ADMIXING IN A MIXER THE PREHEATED MATERIAL WHICH IS PREDOMINANTLY ORE AND FINELY DIVIDED COKING CARBONACEOUS MATERIAL IN SOLID FORM, COMPLETING THE ADMIXING IN THE MIXER BEFORE THE FINELY DIVIDED CARBONACEOUS MATERIAL EXCEEDS A TEMPERATURE OF ABOUT 600* 650* F. AND MAINTINING THE SAME ADMIXED AS THE TEMPERATURE RISES UNTIL THE TEMPERATURE OF THE CARBONACEOUS MATERIAL APPROACHES ITS SOFTENING TEMPERATURE, THEN DISCHARGING THE MIXTURE FROM THE MIXER INTO A ROTATING RETORT WHEREIN THE MIXTURE IS AGITATED AND ADDING FURTHER HEAT TO THE MIXTURE THROUGH THE WALL OF THE RETORT SO THAT THE CARBONACEOUS MATERIAL SOFTENS AND BECOMES STICKY WHILE IN INTIMATE CONTACT WITH THE FINELY DIVIDED MATERIAL WHICH IS PREDOMINANTLY ORE, OBVIATING ANY TENDENCY OF THE RESPECTIVE MATERIALS TO SEGREGATE DURING AGITATION DECAUSE OF A DIFFERENT IN SPECIFIC GRAVITY, THE AGITATION CAUSING PARTICLES OF THE CARBONACEOUS MATERIAL AND PARTICLES OF THE MATERIAL WHICH IS PREDOMINANTLY ORE TO BECOME ADHERENTLY CONNECTED TOGETHER AS FINE SOLIDS FORMING A FLOWABLE MASS, AND CONTINUING THE HEATING AND AGITATION OF THE MIXTURE UNTIL THE MIXTURE ATTAINS A TEMPERATURE OF AT LEAST 850* F. BUT NOT SUBSTANTIALLY HIGHER THAN 1000* F. AND THE CARBONACEOUS MATERIAL RETURNS TO SOLID FORM.

References Cited (Backward Citations)

US1711153A Cited
US2000305A Cited
US1941983A Cited
US2029309A Cited
US2253470A Cited
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US2558613A Cited
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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) 1960-06-03 1960-12-03 1961-06-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1964-06-03 1964-12-03 1965-06-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1968-06-03 1968-12-03 1969-06-04 $7700.00 Window Closed / Lapsed

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