Fluidized bed cellulation process
Patent 4769057 Issued on September 6, 1988. Estimated Expiration Date: 
May 12, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 12, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2691248 3163512 3441396 3532480 Process for the preparation of expansible beads Method for forming coated cellular glass pellets Fluidized bed calcining system Process of making cellulated glass beads Centrifuge apparatus and method for producing hollow microspheres In-mold process for fabrication of molded plastic printed circuit boards InventorsAssigneeApplicationNo. 07/048656 filed on 05/12/1987US Classes:65/21.3, Spheroidizing or rounding of solid glass particles431/3, Decarbonizing, cleaning or purging431/8, Flame shaping, or distributing components in combustion zone65/22With pore forming in situExaminersPrimary: Lindsay, Robert L.Attorney, Agent or FirmInternational ClassesC03B 19/08 (20060101)C03B 19/00 (20060101) C03B 19/10 (20060101) AbstractSintered particles of pulverulant glass and cellulating agent are coated with a parting agent and introduced into a fluidizing vessel. Gas is passed upwardly through the fluidizing vessel at a velocity sufficient to form a fluidized bed of these sintered particles within the fluidizing vessel. The gas and fluidized bed of sintered particles are heated within the fluidizing vessel to a cellulation temperature of the sintered particles to cause the sintered particles within the fluidized bed to form discrete cellular glass nodules of uniform size. The cellular glass nodules formed within the fluidized bed of sintered particles, having a density less than the density of the sintered particles, migrate to the top of the fluidized bed to float on the top surface of the fluidized bed. The discrete cellular glass nodules floating on the top surface of the fluidized bed are withdrawn from the fluidizing vessel. | |
