US2686152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high quality lump coke from lignitic coals
Assignee: Gulf Research and Development Co
•
Filing: 1951-07-26
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Granted: 1954-08-10
•
Expires: 1971-07-26
Abstract
No abstract record available.
Inventors
- 👤 Norman W Franke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:09
CPC Classifications
C; C10; C10B; C10B57/00; C10B57/08; C01; C01B; C01B32/00; C10B55/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS OF PRODUCING A STRONG, COHERENT, POROUS, LUMP COKE FROM A LIGNITIC COAL COMPRISING EXTRACTING THE LIGNITIC COAL IN THE PRESENCE OF HYDROGEN AVAILABLE AT EXTRACTION CONDITIONS WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF POLYNUCLEAR AROMATIC COMPOUNDS, HYDROGENATED POLYNUCLEAR AROMATIC COMPOUNDS, AND THEIR MIXTURES WITH A PHENOLIC COMPOUND, AT ELEVATED TEMPERATURES EFFECTIVE TO FACILITATE THE EXTRACTION AND AT A PRESSURE AT LEAST SUFFICIENT TO RETAIN REACTANTS AND REACTION PRODUCTS, REMOVING THE SOLVENT AND DESTRUCTIVELY DISTILLING THE EXTRACT-RESIDUE MIXTURE TO DRIVE OFF VOLATILE MATERIAL.
Claim 2
Dependent Claim
86 words
THE PROCESS OF PRODUCING A STRONG, COHERENT, POROUS, LUMP COKE FROM A LIGNITIC COAL COMPRISING EXTRACTING THE LIGNITIC COAL IN THE PRESENCE OF HYDROGEN AVAILABLE AT EXTRACTION CONDITIONS WITH A SOLVENT SELECTED FROM THE GROUP CONSISTING OF POLYNUCLEAR AROMATIC COMPOUNDS, HYDROGENATED POLYNUCLEAR AROMATIC COMPOUNDS, AND THEIR MIXTURES WITH A PHENOLIC COMPOUND, AT ELEVATED TEMPERATURES EFFECTIVE TO FACILITATE THE EXTRACTION AND AT A PRESSURE AT LEAST SUFFICIENT TO RETAIN REACTANTS AND REACTION PRODUCTS, REMOVING THE SOLVENT AND DESTRUCTIVELY DISTILLING THE EXTRACT-RESIDUE MIXTURE TO DRIVE OFF VOLATILE MATERIAL.
References Cited (Backward Citations)
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Cited
US1936881A
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US2049013A
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US2215190A
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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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |