US2778718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Comminuted coal fines and method of comminuting agglomerated coal fines
Assignee: Individual
•
Filing: 1955-07-07
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Granted: 1957-01-22
•
Expires: 1975-07-07
Abstract
No abstract record available.
Inventors
- 👤 Hartmann Waldemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/001; B03D1/004; B03D1/016; B03D1/012; B03D2203/00; B03D2203/02; B03D2203/04; B03D2203/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS OF PRODUCING NON-ADHERENT DISINTEGRATED COAL FINES FROM COAL SLIT CONTAINING ADHERENT -200 MESH PARTICLES, WHICH COMPRISES TREATING AN AGGLOMERATED COMPACT ADHESIVE COAL SLIT CONTAINING A SUBSTANTIAL PROPORTION OF -200 MESH PARTICLES AND FROM 10% TO 30% OF WATER BY WEIGHT OF THE SLIT, INCORPORATING WITH SAID SLIT A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF SPENT SULFITE LIQUOR AND THE POWDERED SOLID FORM OF SULFITE LIQUOR, SAID COMPOSITION CONTAINING SOLIDS OF SPENT SULFITE LIQUOR IN A PROPORTION OF ABOUT .1% TO 3% BY WEIGHT OF THE SLIT, AND MIXING THE COMPOSITION AND THE COAL SLIT INTO A MIXUTRE CONTAINING LESS THAN 30% OF WATER BY WEIGHT OF THE SLIT AND UNTIL THE COAL SLIT IS BREAKABLE BY MECHANICAL ACITON.
Claim 2
Dependent Claim
121 words
A PROCESS OF PRODUCING NON-ADHERENT DISINTEGRATED COAL FINES FROM COAL SLIT CONTAINING ADHERENT -200 MESH PARTICLES, WHICH COMPRISES TREATING AN AGGLOMERATED COMPACT ADHESIVE COAL SLIT CONTAINING A SUBSTANTIAL PROPORTION OF -200 MESH PARTICLES AND FROM 10% TO 30% OF WATER BY WEIGHT OF THE SLIT, INCORPORATING WITH SAID SLIT A COMPOSITION SELECTED FROM THE GROUP CONSISTING OF SPENT SULFITE LIQUOR AND THE POWDERED SOLID FORM OF SULFITE LIQUOR, SAID COMPOSITION CONTAINING SOLIDS OF SPENT SULFITE LIQUOR IN A PROPORTION OF ABOUT .1% TO 3% BY WEIGHT OF THE SLIT, AND MIXING THE COMPOSITION AND THE COAL SLIT INTO A MIXUTRE CONTAINING LESS THAN 30% OF WATER BY WEIGHT OF THE SLIT AND UNTIL THE COAL SLIT IS BREAKABLE BY MECHANICAL ACITON.
References Cited (Backward Citations)
US1119500A
Cited
US1246807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-22 | 1960-07-23 | 1961-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-22 | 1964-07-23 | 1965-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-22 | 1968-07-23 | 1969-01-22 | $7700.00 | Window Closed / Lapsed |