Ex Parte Vandendriessche et al - Page 5

                Appeal No. 2006-1036                                                                          
                Application No. 10/191,760                                                                    

                      Thus, the claims are not enabled for their full breadth.  In light                      
                      of the optimal nature of delivery targeting the liver for                               
                      expression of FVIII, and the lack of guidance or working                                
                      examples in the specification and prior art of record on other                          
                      suitable target tissues, including effective routes of delivery to                      
                      those other target tissues, undue experimentation would be                              
                      required to develop the vectors and mode of administration for                          
                      non-hepatic expression of therapeutic levels of FVIII.                                  
                Id. at 7-8.                                                                                   
                      The examiner bears the initial burden of showing that a claimed                         
                invention is nonenabled.  “[A] specification disclosure which contains a                      
                teaching of the manner and process of making and using the invention in                       
                terms which correspond in scope to those used in describing and defining the                  
                subject matter sought to be patented must be taken as in compliance with the                  
                enabling requirement of the first paragraph of § 112 unless there is reason to                
                doubt the objective truth of the statements contained therein which must be                   
                relied on for enabling support.”  In re Marzocchi, 439 F.2d 220, 223,                         
                169 USPQ 367, 369 (CCPA 1971).  “When rejecting a claim under the                             
                enablement requirement of section 112, the PTO bears an initial burden of                     
                setting forth a reasonable explanation as to why it believes that the scope of                
                protection provided by that claim is not adequately enabled by the                            
                description of the invention provided in the specification of the application.”               
                In re Wright, 999 F.2d 1557, 1561-62, 27 USPQ2d 1510, 1513 (Fed. Cir.                         
                1993).  “[E]nablement requires that the specification teach those in the art to               
                make and use the invention without ‘undue experimentation.’ . . . .  That                     
                some experimentation may be required is not fatal; the issue is whether the                   



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