Process for producing a compound oxide type superconducting material
Patent 4900716 Issued on February 13, 1990. Estimated Expiration Date: 
May 18, 2008. 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 18, 2008. 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 ReferencesSuperconductive barium-lead-bismuth oxides Patent #: 3932315 InventorsAssigneeApplicationNo. 195145 filed on 05/18/1988US Classes:505/446, Including coating step127/39, With preliminary purification of starch127/62, Return of intermediate products204/164, Electrostatic field or electrical discharge423/593.1, Plural metals or metal and ammonium containing427/62, Superconductor505/480, Utilizing electromagnetic wave energy, ion, or plasma505/742AnnealingExaminersPrimary: Morgenstern, NormanAssistant: King, Roy V. Attorney, Agent or FirmForeign Patent References
International ClassesB05D 005/12B05D 003/06 Foreign Application Priority Data1987-05-18 JPAbstractThe invention is an after-treatment of a compound oxide type superconducting material by oxygen plasma to improve the superconducting property of the material. The treatment by oxygen plasma is performed while the material is heated at 500° to 1,000° C.The material may have a form of bulky mass or a form of a thin film deposited on a substrate by physical vapor deposition technique.Other References
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