Ex parte CHEN et al. - Page 7




          Appeal 97-1458                                                              
          Application 08/329,940                                                      

                                                                                     
          K))))))))))))))))))))))))))))3)))))))))))))))))))))))))))))M                
          5  Perfluorinated polyether  *       0-11 and 91-100                        
          5                                                                           
          5  (sold by Ausimont as      *                                              
          5                                                                           
          5  Perfluorosolv  PFS-1)TM            *                             5             
          5                            *                                              
          5                                                                           
                                                                                     
          94444444444444444444444444444N444444444444444444444444444448                

                    10. In Example 2, applicants report efforts to find               
          azeotropes of PCBTF and the various 3M PF compounds listed in               
          the table.  According to applicants, "[t]he only azeotrope                  
          found was between 1 and 8 wt% PCBTF and 92 and 99 wt% C F ; it              
                                                                 8 18                 
          had an azeotropic temperature between 98E and 104EC"                        
          (specification, page 7).                                                    

                                   Other findings                                     
                    11. Other findings, as necessary, appear in the                   
          Discussion portion of this opinion.                                         

               B.   Discussion                                                        

                    1.   The examiner's first lack of enablement                      
          rejection                                                                   



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