Patent US2935450A successfully refreshed from Google Patents.
US2935450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing metallurgical coke
Assignee: Houillères de Lorraine
•
Filing: 1956-07-16
•
Granted: 1960-05-03
•
Expires: 1976-07-16
Abstract
No abstract record available.
Inventors
- 👤 Jully Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:47
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF PRODUCING METALLURGICAL COKE HAVING MICUM INDEXES M40 SUBSTANTIALLY EQUAL TO 80 AND M10 LOWER THAN 8, FROM WEAKLY COKING COALS, WHICH COALS HAVE MOREOVER A LOW BITUMEN CONTENT, A HIGH PERCENTAGE OF VOLATILE MATTER RAINGING FROM 27% TO 45*, A SWELLING INDEX ACCORDING TO THE ASTM D720-46 METHOD OF FROM 2 TO 9 AND A HIGH OXYGEN CONTENT RANGING FROM 6 TO 12.5%, SUCH AS SARR-LORRAINE COALS OF THE TYES CONSISTING OF "GRAS A," "GRAS B" AND "FLAMBANTS GRAS," WHICH COMPRISES FREEING FROM DUST A PORTION OF SAID WEAKLY COKING COAL, CRUSHING SAID DUST-FREED PORTION, SEPARATING FROM THE CRUSHED COAL SMALL COAL CONTAINING FUSAIN AND GANGUE, CRUSHING THE REMAINING PART OF THE CRUSHED COAL INTO CENTAGE OF VOLATILE MATTE RANGING FROM 27% TO 33% AND
Claim 2
Independent Claim
128 words
A METHOD OF PRODUCING METALLURGICAL COKE HAVING MICUM INDEXES M40 SUBSTANTIALLY EQUAL TO 80 AND M10 LOWER THAN 8, FROM WEAKLY COKING COALS, WHICH COALS HAVE MOREOVER A LOW BITUMEN CONTENT, A HIGH PERCENTAGE OF VOLATILE MATTER RAINGING FROM 27% TO 45*, A SWELLING INDEX ACCORDING TO THE ASTM D720-46 METHOD OF FROM 2 TO 9 AND A HIGH OXYGEN CONTENT RANGING FROM 6 TO 12.5%, SUCH AS SARR-LORRAINE COALS OF THE TYES CONSISTING OF "GRAS A," "GRAS B" AND "FLAMBANTS GRAS," WHICH COMPRISES FREEING FROM DUST A PORTION OF SAID WEAKLY COKING COAL, CRUSHING SAID DUST-FREED PORTION, SEPARATING FROM THE CRUSHED COAL SMALL COAL CONTAINING FUSAIN AND GANGUE, CRUSHING THE REMAINING PART OF THE CRUSHED COAL INTO CENTAGE OF VOLATILE MATTE RANGING FROM 27% TO 33% AND
References Cited (Backward Citations)
US1824526A
Cited
US2091711A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |