US2803587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat treatment, separation, and coking coal
Assignee: Individual
•
Filing: 1956-05-15
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Granted: 1957-08-20
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jung Frederic William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF SEPARATING HIGH VITRAIN COAL FROM A BANDED MIXTURE OF COAL FORMS WHICH COMPRISES CRUSHING SAID MIXTURE TO PARTICLE SIZE NOT GREATER THAN MINIMUM THICKNESS OF THE INCLUDE VITRAIN LAYERS, HEATING THE CRUSHED MIXTURE WHILE IN AN INERT ATMOSPHERE TO A TEMPERATURE ABOVE THE INTIAL SOFTENING POINT OF THE INCLUDED VITRAIN ADD BELOW THE POINT OF MAXIMUM FLUIDITY THEREOFF THEREBY CAUSING SWELLING OF SAID HIGH VITRAIN PARTICULES AND CONSEQUENT REDUCTION IN EFFECTIVE DENSITY THEREOF, MECHANICALLY AGITATING SAID CRUSHED MIXTURE WHILE AT ELEVATED TEMPERATURE TO PREVENT AGGLOMERATION, AND UTILIZING THE RESULTING DUFFERENCE IN DENSITY OF THE MIXED PARTICULES TO EFFECT SEPARATION THEREOF.
Claim 2
Independent Claim
103 words
THE METHOD OF SEPARATING HIGH VITRAIN COAL FROM A BANDED MIXTURE OF COAL FORMS WHICH COMPRISES CRUSHING SAID MIXTURE TO PARTICLE SIZE NOT GREATER THAN MINIMUM THICKNESS OF THE INCLUDE VITRAIN LAYERS, HEATING THE CRUSHED MIXTURE WHILE IN AN INERT ATMOSPHERE TO A TEMPERATURE ABOVE THE INTIAL SOFTENING POINT OF THE INCLUDED VITRAIN ADD BELOW THE POINT OF MAXIMUM FLUIDITY THEREOFF THEREBY CAUSING SWELLING OF SAID HIGH VITRAIN PARTICULES AND CONSEQUENT REDUCTION IN EFFECTIVE DENSITY THEREOF, MECHANICALLY AGITATING SAID CRUSHED MIXTURE WHILE AT ELEVATED TEMPERATURE TO PREVENT AGGLOMERATION, AND UTILIZING THE RESULTING DUFFERENCE IN DENSITY OF THE MIXED PARTICULES TO EFFECT SEPARATION THEREOF.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |