Ex Parte ZHANG et al - Page 5



                  Appeal No. 2001-0693                                                                                        Page 5                      
                  Application No. 08/898,300                                                                                                              
                  Nemours & Co., 750 F.2d 1569, 1576-77, 224 USPQ 409, 414 (Fed. Cir. 1984), where                                                        
                  the court stated:                                                                                                                       
                           Even if some of the claimed combinations were inoperative, the claims are                                                      
                           not necessarily invalid.  "It is not a function of the claims to specifically                                                  
                           exclude . . .  possible inoperative substances . . . .”  In re Dinh-Nguyen,                                                    
                           492 F.2d 856, 858-59, 181 USPQ 46, 48 (CCPA 1974) (emphasis                                                                    
                           omitted).  Accord, In re Geerdes, 491 F.2d 1260, 1265, 180 USPQ 789,                                                           
                           793 (CCPA 1974); In re Anderson, 471 F.2d 1237, 1242, 176 USPQ 331,                                                            
                           334-35 (CCPA 1973).  Of course, if the number of inoperative                                                                   
                           combinations becomes significant, and in effect forces one of ordinary                                                         
                           skill in the art to experiment unduly in order to practice the claimed                                                         
                           invention, the claims might indeed be invalid.  See, e.g., In re Cook, 439                                                     
                           F.2d 730, 735, 169 USPQ 298, 302 (CCPA 1971).                                                                                  
                           Again, absent a fact-based explanation from the examiner why the number of                                                     
                  possible inoperative embodiments is significant, we do not find that the examiner has                                                   
                  established a prima facie case of non-enablement.                                                                                       
                           The decision of the examiner is reversed.                                                                                      
                                                                    REVERSED                                                                              


                                                                                          )                                                               
                                                      William F. Smith                             )                                                      
                                                      Administrative Patent Judge                  )                                                      
                                                                                                   )                                                      
                                                                                                   )                                                      
                                                                                                   ) BOARD OF PATENT                                      
                                                      Donald E. Adams                              )                                                      
                                                                                                   ))   APPEALS AND                                       
                                                      Administrative Patent Judge                                                                         
                                                                                                   )                                                      
                                                                                                   ) INTERFERENCES                                        
                                                      Demetra J. Mills                             )                                                      
                                                      Administrative Patent Judge                  )                                                      

                  Brenda H. Jarrell, Esq.                                                                                                                 
                  Choate, Hall & Stewart                                                                                                                  
                  Exchange Place                                                                                                                          





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