Production of compounds by reaction of solid materials at high temperatures produced by plasma arc torches
Patent 4766284 Issued on August 23, 1988. Estimated Expiration Date: 
March 5, 2006. 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.
March 5, 2006. 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 3179784 3710070 Processes for making hollow metal microballoons and the products thereof Method and apparatus for ultra high velocity dual stream metal flame spraying Patent #: 4370538 InventorAssigneeApplicationNo. 06/836530 filed on 03/05/1986US Classes:219/121.59, Methods219/121.47, Spray coating219/76.16, Plasma252/62.63, Calcium, barium, strontium, or lead427/453, Metal oxide containing coating75/10.19PlasmaExaminersPrimary: Paschall, Mark H.Attorney, Agent or FirmInternational ClassesC01B 13/32 (20060101)C01G 49/00 (20060101) Foreign Application Priority Data1985-03-05 GBAbstractReactions between solid materials to form useful products, for example, strontium ferrites, are effected by heating a primary solid feed material with a plasma gas stream to melt the primary feed material and then contacting a secondary solid feed material with the molten primary feed material and the plasma gas stream to melt the secondary feed material and enable reaction among the reactants to occur. The method of the invention simplifies the effecting of solid-solid reactions using plasma gas streams and permits the use of impure materials as the secondary feed material, strontium carbonate or strontium oxide and ferric oxide (hematite), so as to form a strontium ferrite. | |
