Patent US4577611A successfully refreshed from Google Patents.
US3051628A
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Preparing metallurgical fuel from noncaking coal utilizing air-blown pitch binder
Assignee: CHAMBER MAID LP
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Filing: 1960-07-22
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Granted: 1962-08-28
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Expires: 1980-07-22
Abstract
No abstract record available.
Inventors
- 👤 Gorin Everett
- 👤 Robert J Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:35
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08; C10L; C10L5/00; C10L5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF PREPARING COKED BRIQUETS FROM A NON-CRACKING COAL WHICH COMPRISES CARBONIZING SAID NONCAKING COAL TO PRODUCE GAS, TAR AND CHAR, HEATING SAID CHAR IN PARTICULATE FROM TO AN ELEVATED TEMPERATURE ABOVE THE CARBONIZATION TEMPERATURE AT WHICH SAID CHAR WAS GENERATED TO EFFECT SHRINKING OF THE CHAR, RECOVERING A HIGH BOILING PITCH FROM SAID TAR, SUBJECTING SAID PITCH TO AIR BLOWING AT AN ELEVATED TEMPERATURE THEREBY INCREASE ITS FIXED CARBON CONTENT, FORMING RAW BRIQUETS FROM SAID PRESHRUNK CHAR AND SAID AIR BLOW PITCH AT LOW TEMPERATURE, AND THEREAFTER COKING SAID RAW BRIQUETS.
Claim 2
Independent Claim
93 words
THE METHOD OF PREPARING COKED BRIQUETS FROM A NON-CRACKING COAL WHICH COMPRISES CARBONIZING SAID NONCAKING COAL TO PRODUCE GAS, TAR AND CHAR, HEATING SAID CHAR IN PARTICULATE FROM TO AN ELEVATED TEMPERATURE ABOVE THE CARBONIZATION TEMPERATURE AT WHICH SAID CHAR WAS GENERATED TO EFFECT SHRINKING OF THE CHAR, RECOVERING A HIGH BOILING PITCH FROM SAID TAR, SUBJECTING SAID PITCH TO AIR BLOWING AT AN ELEVATED TEMPERATURE THEREBY INCREASE ITS FIXED CARBON CONTENT, FORMING RAW BRIQUETS FROM SAID PRESHRUNK CHAR AND SAID AIR BLOW PITCH AT LOW TEMPERATURE, AND THEREAFTER COKING SAID RAW BRIQUETS.
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) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |