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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:
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Patent Number Title Of Patent Date Issued
8673032 Method of manufacturing coke from low grade coal Mar. 18, 2014
8585786 Methods and systems for briquetting solid fuel Nov. 19, 2013
8523961 Method for manufacturing briquetted solid fuel using porous coal as starting material Sep. 3, 2013
8460407 Form of coal particles Jun. 11, 2013
8343243 Method and apparatus for blending lignite and coke slurries Jan. 1, 2013
8250996 Process and apparatus for burning coal instead of oil Aug. 28, 2012
7909896 Process for production of low temperature char during production of low temperature tars Mar. 22, 2011
7645362 Method for pretreating and improving coking coal quality for blast furnace coke Jan. 12, 2010
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

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