SAWADA et al. V. JIN et al. - Page 3

          Interference No. 103,141                                                    

          or the like.  The conductor is manufactured by placing super-               
          conducting oxide powder in a tube of so-called normal metal.                
          The metal is normal in the sense that it is not                             

          The normal metal thus establishes a cladding around the oxide               
          powder.  The powder and the cladding are subject to a cross-                
          section reduction metal working procedure to reduce the powder              
          and the cladding to a wire size article or elongate body.                   
          Thereafter, the elongate body is heat treated so that                       
          substantial sintering of the oxide powder occurs, resulting in              
          a product that has a superconducting core in a normal metal                 
          outer cladding.                                                             
                    In Jin’s disclosure, the superconducting oxide,                   
          YBa Cu O , is of the so-called 1,2,3-type.  When the oxide                  
             2 3 6.9                                                                  
          powder is sintered, provision must be made to keep the oxygen               
          content of the sintered oxide within an acceptable range.                   
          Solutions to this problem include selecting a cladding that                 
          does not oxidize at the sintering temperature preventing                    
          reaction of the cladding with the oxide powder, or providing                
          orifices in the cladding to admit additional oxygen.                        

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