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Class Information
Number: 44/608
Name: Fuel and related compositions > "low-rank" coal (e.g., lignite, etc.)
Description: Product or process in which a starting material is coal of less heat value than bituminous coal, including brown coal, lignite, etc.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7537700 |
Method for removing water contained in solid using liquid material |
May. 26, 2009 |
| 7338542 |
Designed cellular coal |
Mar. 4, 2008 |
| 6846339 |
Process for upgrading low rank carbonaceous material |
Jan. 25, 2005 |
| 6558441 |
Process of upgrading low rank coal |
May. 6, 2003 |
| 6447559 |
Treatment of coal |
Sep. 10, 2002 |
| 6436158 |
Coal reforming process and apparatus therefor |
Aug. 20, 2002 |
| 6325001 |
Process to improve boiler operation by supplemental firing with thermally beneficiated low rank coal |
Dec. 4, 2001 |
| 6146432 |
Pressure gradient passivation of carbonaceous material normally susceptible to spontaneous combustion |
Nov. 14, 2000 |
| 5527365 |
Irreversible drying of carbonaceous fuels |
Jun. 18, 1996 |
| 5503646 |
Process for coal - heavy oil upgrading |
Apr. 2, 1996 |
| 5482517 |
Coal-water mixture and process for producing same |
Jan. 9, 1996 |
| 5474582 |
Coal-water mixtures from low rank coal and process of preparation thereof |
Dec. 12, 1995 |
| 5411560 |
Method of producing binderless pellets from low rank coal |
May. 2, 1995 |
| 5364421 |
Coal blends having improved ash viscosity |
Nov. 15, 1994 |
| 5324336 |
Partial oxidation of low rank coal |
Jun. 28, 1994 |
| 5322530 |
Process for clean-burning fuel from low-rank coal |
Jun. 21, 1994 |
| 5290324 |
Coal-water mixture using upgraded low-rank coal and process for producing said mixture |
Mar. 1, 1994 |
| 5162050 |
Low-rank coal oil agglomeration product and process |
Nov. 10, 1992 |
| 5085764 |
Process for upgrading coal |
Feb. 4, 1992 |
| 5084160 |
Method for solubilization of low-rank coal using low molecular weight cell-free filtrates derived from cultures of coriolus versicolor |
Jan. 28, 1992 |
| 5059307 |
Process for upgrading coal |
Oct. 22, 1991 |
| 5049163 |
Process for reducing sulphur dioxide emission from burning coal containing sulphur |
Sep. 17, 1991 |
| 5035721 |
Method for beneficiation of low-rank coal |
Jul. 30, 1991 |
| 5033230 |
Method for passivating particulate coal |
Jul. 23, 1991 |
| 5032146 |
Low-rank coal oil agglomeration |
Jul. 16, 1991 |
| 4874393 |
Method of producing fuel of relatively higher calorific value from low rank and oxidized coal |
Oct. 17, 1989 |
| 4810258 |
Low rank coal or peat having impurities removed by a drying process |
Mar. 7, 1989 |
| 4788360 |
Process for the production of regenerated humic acids from coal |
Nov. 29, 1988 |
| 4761162 |
Upgrading and storage of solid carbonaceous fuel |
Aug. 2, 1988 |
| 4758244 |
Upgrading solid fuels |
Jul. 19, 1988 |
| 4728339 |
Multiple hearth apparatus and process for thermal treatment of carbonaceous materials |
Mar. 1, 1988 |
| 4705533 |
Utilization of low rank coal and peat |
Nov. 10, 1987 |
| 4650495 |
Method for stabilizing dried low rank coals |
Mar. 17, 1987 |
| 4619669 |
Method for increased mine recovery and upgrading of lignite |
Oct. 28, 1986 |
| 4613429 |
Process for removing mineral matter from coal |
Sep. 23, 1986 |
| 4605421 |
Process for the preparation of a carbonaceous-derived solid fuel product |
Aug. 12, 1986 |
| 4586935 |
Method of preparing coal to increase its calorific value and making it safe for storage and transport |
May. 6, 1986 |
| 4583990 |
Method for the beneficiation of low rank coal |
Apr. 22, 1986 |
| 4579562 |
Thermochemical beneficiation of low rank coals |
Apr. 1, 1986 |
| 4571174 |
Method for drying particulate law rank coal in a fluidized bed |
Feb. 18, 1986 |
| 4571300 |
Process for reducing the bound water content of coal |
Feb. 18, 1986 |
| 4547198 |
Method for discharging treated coal and controlling emissions from a heavy oil spray system |
Oct. 15, 1985 |
| 4523927 |
Method of coal upgrading |
Jun. 18, 1985 |
| 4514912 |
Process for drying of organic solid materials, particularly brown coals |
May. 7, 1985 |
| 4511362 |
Fluidized bed desulfurization |
Apr. 16, 1985 |
| 4511363 |
Method of upgrading low-rank coal |
Apr. 16, 1985 |
| 4504274 |
Enrichment of low grade coals |
Mar. 12, 1985 |
| 4498905 |
Method for deactivating and controlling the dusting tendencies of dried particulate lower rank coal |
Feb. 12, 1985 |
| 4486959 |
Process for the thermal dewatering of young coals |
Dec. 11, 1984 |
| 4468231 |
Cation ion exchange of coal |
Aug. 28, 1984 |
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