# US 7,484,567 B2 · Applying solid carbon dioxide to a hazardous material or fire > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,484,567 B2 - Document ID: US7484567B2 - Status: Granted - Kind: B2 - Application number: 11/925,653 - Filed: 2007-10-26 - Published: 2008-03-06 - Granted: 2009-02-03 - Earliest claimed: 2005-10-03 - Assignees: Cryo Response, Inc. - Inventors: Albert F. Demange; Christoper J. Noël; Gerald P. Zeilhofer - Web page: https://patentgrep.com/patent/US7484567B2 ## CPC - A62C 3/0228: {with delivery of fire extinguishing material by air or aircraft (fire-fighting aircraft B64D1/16)} - A62C 3/0292: {by spraying extinguishants directly into the fire (A62C3/0242 takes precedence)} - A62C 99/0027: {Carbon dioxide extinguishers} - E21B 35/00: Methods or apparatus for preventing or extinguishing fires - A62C: FIRE-FIGHTING (fire-extinguishing compositions, use of chemical substances in extinguishing fires A62D1/00; spraying, applying liquids or other fluent materials to surfaces in general B05; alarm arrangements G08B, e.g. fire alarms actuated by smoke or gases G08B17/10) - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract Delivery of pelletized carbon dioxide (dry ice) to a target material such as a hazardous material or a fire from a distance, by projection, spraying, or aerial dropping the pelletized carbon dioxide onto the target material using gravity. Delivery may be made by a mobile apparatus. The types of target material with which the present invention is designed to apply may include, e.g., hydrocarbon material, hazardous material, burning material, and the like. The carbon dioxide may be pelletized to diameters in a size range of about 3 mm to 100 mm. ## Claims ### Claim 1 A method of fire and or hazardous material abatement by applying carbon dioxide (CO2) in a solid state to a fire and/or hazardous material, comprising pelletizing carbon dioxide into a plurality of solid, uncoated carbon dioxide pellets form, from 3 mm to 100 mm in diameter; and delivering the plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter onto the-fire and/or hazardous material. ### Claim 2 (depends on 1) The method of claim 1, wherein delivering the plurality of solid uncoated carbon dioxide pellets onto the fire and/or hazardous material is by a nozzle. ### Claim 3 (depends on 1) The method of claim 1, further comprising storing the plurality of solid uncoated carbon dioxide pellets in a hopper. ### Claim 4 (depends on 1) The method of claim 1, wherein delivering plurality of solid uncoated carbon dioxide pellets is aided with a nitrogen stream. ### Claim 5 (depends on 4) The method of claim 4, wherein the nitrogen stream is applied in sufficient quantity such that moisture does not interfere with delivery of the plurality of solid uncoated carbon dioxide pellets. ### Claim 6 (depends on 1) The method of claim 1, wherein delivering plurality of solid uncoated carbon dioxide in pellets is performed from a support structure, disposed a predetermined distance from the fire and/or hazardous material. ### Claim 7 (depends on 6) The method of claim 6, wherein delivering the plurality of solid uncoated carbon dioxide pellets onto the fire and/or hazardous material is by spraying. ### Claim 8 (depends on 6) The method of claim 6, wherein the support structure is a vehicle. ### Claim 9 (depends on 6) The method of claim 6, wherein delivering the plurality of solid uncoated carbon dioxide pellets is accomplished by dropping the plurality of solid uncoated carbon dioxide pellets by gravity onto the fire and/or hazardous material. ### Claim 10 (depends on 1) The method of claim 1, wherein pelletizing the carbon dioxide pellets is performed by extruding liquid carbon dioxide into pellet form. ### Claim 11 A fire and/or hazardous material abatement support structure comprising: a pelletizer forming solid uncoated carbon dioxide from 3 mm to 100 mm in diameter pellets disposed on the fire and/or hazardous material abatement support structure and configured for connection to a source of liquid carbon dioxide; a delivery device disposed on the fire and/or hazardous material abatement support structure projecting or spraying the solid uncoated carbon dioxide from 3 mm to 100 mm in diameter onto a fire and/or hazardous material pellets. ### Claim 12 (depends on 11) The support structure for applying carbon dioxide to a fire and/or hazardous material of claim 11, further comprising a storage device disposed on the support structure for storing the solid uncoated carbon dioxide pellets. ### Claim 13 (depends on 11) The support structure of claim 11, wherein the support structure is portable such that the delivery device can project or spray the solid uncoated carbon dioxide pellets onto the fire and/or hazardous material. ### Claim 14 (depends on 11) The support structure of claim 11, wherein the support structure is disposed on a moveable vehicle. ### Claim 15 (depends on 13) The support structure of claim 13, wherein the carbon dioxide processing equipment is powered by a generator carried by the moveable vehicle. ### Claim 16 (depends on 11) The support structure of claim 11, wherein the source of liquid carbon dioxide is an air extraction unit. ### Claim 17 A fire and or hazardous material abatement method of applying solid carbon dioxide pellets from 3 mm to 100 mm in diameter to extinguish a fire and/or hazardous material comprising: pelletizing carbon dioxide into solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter; storing the solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter in a storage bin; mixing the solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter with nitrogen prior to projecting or spraying the solid uncoated carbon dioxide pellets; and pumping the solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter from the storage bin onto the fire and or hazardous material. ### Claim 18 A fire and or hazardous material abatement method of abating a fire or a hazardous material spill by an application of a plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter comprising: pelletizing carbon dioxide into the plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter; applying the plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter to the fire or hazardous material spill; freezing the hazardous material or a fuel to the fire by the application of the plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter; lowering an ambient temperature by the application of the plurality of solid uncoated carbon dioxide pellets from 3 mm to 100 mm in diameter; and removing surrounding oxygen, in which freezing caused by the plurality of solid uncoated carbon dioxide pellets causes the hazardous material to shrink and lift off of a surface, and in which a chemical reaction fueling the fire is eliminated by freezing.