Ex parte SODA et al. - Page 1




                           THIS OPINION WAS NOT WRITTEN FOR PUBLICATION                                           










                                            DECISION ON APPEAL                                                    
             This is an appeal under 35 U.S.C.  134 from the examiner’s refusal to allow                         
             claims 1                                                                                             
             through 6 which are all the claims remaining in the application.                                     
                                                THE INVENTION                                                     
             The invention is directed to a metal powder having a spherical shape, an average                     
             particle size of 25 m or less, and a tap density ratio of 50 - 60%.  In one                         
             embodiment, the powder is prepared by forming metal particles from non-spherical                     
             molten metal by water atomization followed by subjecting the resulting particles to a                
             high speed gas stream in the presence of a collision target.                                         
                                                  THE CLAIMS                                                      
             Claims 1 and 2 are illustrative of appellants’ invention and are reproduced                          
             below.                                                                                               
                    1. A water-atomized metal powder having a spherical particle shape, an average                
             particle size of 25 m or less and a tap density ratio of 50 - 60%.                                  
                    2. A method for producing water-atomized spherical metal powder, the method                   
             comprising forming metal particles of non-spherical shapes from molten metal by                      
             water-atomization, and subjecting the metal particles to a high speed gas stream to                  
             cause high speed collisions to occur between said particles and between said                         


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