Did You Know...
...In 1790, the cost to obtain a patent was between $4 and $5.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6846339 | Process for upgrading low rank carbonaceous material A process for upgrading brown coal is disclosed, including providing at least two converging surfaces defining a nip, wherein at least one of the surfaces is rollable in a direction toward the nip; feeding the brown coal to the nip where, by the rolling action of th... | 01/25/2005 |
| 6786941 | Methods of controlling the density and thermal properties of bulk materials Methods of controlling the bulk density, permeability, moisture retention and thermal properties of bulk materials are provided by selectively sizing the bulk material. Preferably, the bulk material is sized into successively smaller particle size fractions, with th... | 09/07/2004 |
| 6447559 | Treatment of coal Process for treating coal to enhance its rank, wherein the temperature of the material is gradually increased in a controlled set of atmospheres, to allow for the reduction of surface and inherent moisture and the controlled reduction of volatile matter w... | 09/10/2002 |
| 6436158 | Coal reforming process and apparatus therefor As one of the coal reforming treatment steps constituting a coal reforming process, an oxidation treatment step is carried out on a circular grate. For this purpose, there is used a coal reforming apparatus comprising a circular grate, the circular grate ... | 08/20/2002 |
| 6231627 | Method to reduce oxidative deterioration of bulk materials A method and composition are disclosed to reduce the oxidative deterioration of bulk materials. Preferred embodiments of bulk materials include solid fuel materials, such as coal, and bulk food products. The method includes sizing a bulk material so that ... | 05/15/2001 |
| 5919277 | Method to reduce oxidative deterioration of bulk materials Disclosed is a method to reduce oxidative deterioration of bulk materials. Preferred embodiments of bulk materials include solid fuel materials, such as coal, and bulk food products. The method includes contacting a bulk material with a heat transfer medi... | 07/06/1999 |
| 5893946 | Combustible carbonaceous compositions and methods A combustible carbonaceous composition and method of making a charcoal briquette wherein a finely divided carbonaceous material is combined with an activated carbon and/or an activated graphite (which may be formed in-situ during pyrolysis of the composit... | 04/13/1999 |
| 5752993 | Blast furnace fuel from reclaimed carbonaceous materials and related methods A compressed briquette or other solid shape, object, or article useful as a coke substitute in blast furnaces disclosed as being manufactured so as to comprise a reaction product of fine carbonaceous material (such as coke breeze, coke fines, or petroleum... | 05/19/1998 |
| 5725613 | Method to reduce oxidative deterioration of bulk materials Disclosed is a method to reduce oxidative deterioration of bulk materials. Preferred embodiments of bulk materials include solid fuel materials, such as coal, and bulk food products. The method includes contacting a bulk material with a heat transfer medi... | 03/10/1998 |
| 5599361 | Reclaiming and utilizing discarded and newly formed coke breeze, coal fines, and blast furnace revert materials, and related methods A method and a solid fuel product, such as briquettes and pellets, comprising carbon fines, in the form of heretofore discardable coke breeze and/or coal fines and/or revert materials, bound together chemically into smaller pieces to substantially prevent... | 02/04/1997 |
| 5527365 | Irreversible drying of carbonaceous fuels The invention disclosed relates to a method for drying low-quality solid carbonaceous fuels such as lignite and sub-bituminous coal to reduce the moisture content substantially to zero, and to minimize re-adsorption of moisture during storage and transpor... | 06/18/1996 |
| 5503646 | Process for coal - heavy oil upgrading A process for upgrading a low rank coal and a heavy oil to produce an improved coal product and an improved oil product. First, the low rank coal is dewatered to reduce its moisture content to less than about 4 percent in order to render the low rank coal... | 04/02/1996 |
| 5487764 | Reclaiming and utilizing discarded and newly formed coke breeze, coal fines, and blast furnace revert materials, and related methods A method and a solid fuel product, such as briquettes and pellets, comprising carbon fines, in the form of heretofore discardable coke breeze and/or coal fines and/or revert materials, bound together chemically into smaller pieces to substantially prevent... | 01/30/1996 |
| 5453103 | Reclaiming and utilizing discarded and newly formed coke breeze, coal fines, and blast furnace revert materials, and related methods A method and a solid fuel product, such as briquettes and pellets, comprising carbon fines, in the form of heretofore discardable coke breeze and/or coal fines and/or revert materials, bound together chemically into smaller pieces to substantially prevent... | 09/26/1995 |
| 5429645 | Solid fuel and process for combustion of the solid fuel A solid fuel containing a recycled residue from anaerobic fermentation or anaerobic digestion of an organic material. The solid fuel can also contain a volatile solid fossil fuel. The residue is preferably derived from an anaerobic digestion process of mu... | 07/04/1995 |
| 5411560 | Method of producing binderless pellets from low rank coal The invention relates to a method and apparatus of forming pellets and in particular spherical binderless pellets from lower rank coals. The method includes the steps of feeding a pelletizing means 10, with a lower rank feedstock, 1; rotating the coal in ... | 05/02/1995 |
| 5290324 | Coal-water mixture using upgraded low-rank coal and process for producing said mixture The present invention provides a process for producing a coal-water mixture using a reaction mixture obtained by subjecting a low-rank coal of high water content to a hydrothermal treatment in the presence of carbon monoxide and water at a temperature not... | 03/01/1994 |
| 5244473 | Process for making moisture resistant briquettes A method is disclosed for bonding particles into briquettes wherein the particles to be briquetted are mixed with a phenolaldehyde resin and polyisocyanate in the presence of a catalyst, and the resulting mixture is briquetted. A phenolic-urethane polymer... | 09/14/1993 |
| 5162050 | Low-rank coal oil agglomeration product and process A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-decrepitating, shippable fuel. The low-rank coal is treated, under high... | 11/10/1992 |
| 5032146 | Low-rank coal oil agglomeration A low-rank coal oil agglomeration process. High mineral content, a high ash content subbituminous coals are effectively agglomerated with a bridging oil which is partially water soluble and capable of entering the pore structure, and usually coal derived.... | 07/16/1991 |
| 4759772 | Method of controlling self-ignition of low rank coal Self-ignition of low rank coal is inhibited by application of a permanganate salt, such as potassium permanganate, together with a phosphorus compound, such as a phosphoric or polyphosphoric acid. The inhibitors are applied in aqueous solution following d... | 07/26/1988 |
| 4758244 | Upgrading solid fuels Densified coal pellets of improved physical properties and enhanced calorific value are produced by a process which includes subjecting coal to a shearing-attritioning step followed by extrusion and drying steps, characterised by incorporating an additive... | 07/19/1988 |
| 4702745 | Process for dewatering high moisture, porous organic solid A high moisture porous organic solid is dewatered by the steps of (1) heating the high moisture porous organic solid in a fluid medium having an elevated temperature and a high pressure, thereby reducing the moisture of the solid, (2) starting to compress... | 10/27/1987 |
| 4701184 | Upgrading solid fuels Process for treatment of brown coal which comprises subjecting the said coal to shearing forces to produce a plastic mass which is capable of conversion by subsequent compaction and drying into a fuel of increased density and enhanced calorific value, is ... | 10/20/1987 |
| 4671801 | Method for the beneficiation, liquefaction and recovery of coal and other solid carbonaceous materials An integrated, continuous (or batch) process for the beneficiation and/or liquefaction of coal, especially low rank coals, is provided, the process generally involving admixing coal with an organic liquid medium under high shear agitation, further benefic... | 06/09/1987 |
| 4668244 | Method and apparatus for upgrading low rank coal A method and apparatus for upgrading low rank coal, wherein the sealing efficiency between the inside and the outside of a system and between the successive stages of apparatus is improved. Such improvement is provided between a drying apparatus for dryin... | 05/26/1987 |
| 4650495 | Method for stabilizing dried low rank coals A method for pyrophoric particle protection of carbonaceous material particularly low rank coals where the material is simultaneously coated with a treating agent and cooled by a fluidizing gas.... | 03/17/1987 |
| 4605421 | Process for the preparation of a carbonaceous-derived solid fuel product A method for producing carbonaceous-derived solid fuel products comprising subjecting a carbonaceous material to a temperature sufficient to remove a substantial portion of water inherent in said carbonaceous material, pyrolyzing at least a portion of the... | 08/12/1986 |
| 4586936 | Fuel briquets Fuel briquettes containing binding agents and additives, obtained by briquetting 80-99% by weight of an essentially solid fuel, 0.1-19% by weight of a natural or synthetic binding agent and 0.1-10% of a cationic polyurethane obtained by a monomeric alipha... | 05/06/1986 |
| 4559060 | Upgrading method of low-rank coal A upgrading method of low-rank coal containing higher ash and moisture contents into coal decreased in ash content and decreased in moisture content and heightened in heating value includes subjecting the low-rank coal to a low-temperature dry distillatio... | 12/17/1985 |
| 4494958 | Blending asphaltite with lignite or bituminous coal The use of asphaltite blended with bituminous coals and lignites changes the agglomeration properties and quality of the resultant mixture to a degree and extent disproportionate to the blend.... | 01/22/1985 |
| 4412840 | Pelletizing lignite Lignite is formed into high strength pellets having a calorific value of at least 9,500 Btu/lb by blending a sufficient amount of an aqueous base bituminous emulsion with finely-divided raw lignite containing its inherent moisture to form a moistened gree... | 11/01/1983 |
| 4412841 | Compacted carbonaceous shapes and process for making the same Compacted carbonaceous shapes are produced by mixing a particulate carbonaceous material with a binder, forming green shapes from the mixture, and heating the green shapes by induction heating or microwave heating or a combination thereof. The process is ... | 11/01/1983 |
| 4259157 | Method of producing abrasion-proof coke forms from bituminous coal, brown coal or peat briquets Abrasion-proof coke forms are produced from bituminous coal, brown coal, or peat in the form of briquets, by preheating the briquets, dehydrating or predrying them, carbonizing them and then cooling them in at least three separate stages in which the briq... | 03/31/1981 |
| 4248603 | Method and tank for producing hot briquettes A method for producing hot briquettes, for example, for use in blast furnaces, and using a briquetting material of non-caking components, such as low temperature coke from bituminous coal and/or lignite, coke dust and/or oil coke and caking fat coal at te... | 02/03/1981 |
| 4244700 | Method of and apparatus for heat processing of pulverized solid fuel According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel t... | 01/13/1981 |
| 4226601 | Process for reducing sulfur contaminant emissions from burning coal or lignite that contains sulfur A process for preparing a coal or lignite fuel that contains sulfur for combustion wherein reduced amounts of sulfur containing air contaminants are emitted from the combustion is disclosed. In the disclosed process, the coal or lignite that contains sulf... | 10/07/1980 |
| 4192652 | Process for preparing sulfur-containing coal or lignite for combustion having low SO2 emissions A process for preparing a coal or lignite fuel that contains sulfur for combustion wherein reduced amounts of sulfur-containing air contaminants are emitted from the combustion. In the disclosed process, the coal or lignite that contains sulfur is pulveri... | 03/11/1980 |
| 4121910 | Treating carbonaceous material A method of treating a solid carbonaceous material comprising essentially lignite or bituminous or subbituminous coal to provide therefrom finely dispersed solid particles substantially free of ash and sulfur, by mixing the solid material with a liquid aq... | 10/24/1978 |
| 4018571 | Treatment of solid fuels Low rank solid fuels are upgraded by heating a mixture of particulate fuel and water to a temperature between 300° F. and the critical temperature of water under a pressure sufficient to maintain substantially all of the water in liquid state, cooling th... | 04/19/1977 |
