Ex parte CHASE et al. - Page 4




                Appeal No. 95-1238                                                                                                            
                Application 08/009,406                                                                                                        


                that it would have been obvious to simplify the Arendt invention                                                              
                by assuming that the absorption coefficients of titanium oxide                                                                
                and calcium carbonate are equal as taught by Utt and thus                                                                     
                utilizing only two x-ray energies instead of three x-ray energies                                                             
                as taught by Arendt.                                                                                                          
                         Rather than reiterate the arguments of Appellants and the                                                            
                Examiner, reference is made to the briefs  and answer for the        2                                                        
                respective details thereof.                                                                                                   
                                                                 OPINION                                                                      
                         We will not sustain the rejection of claims 1 through 25                                                             
                under 35 U.S.C. § 103.                                                                                                        
                         The Examiner has failed to set forth a prima facie case.                                                             
                It is the burden of the Examiner to establish why one having                                                                  
                ordinary skill in the art would have been led to the claimed                                                                  
                invention by the express teachings or suggestions found in the                                                                
                prior art, or by implications contained in such teachings or                                                                  
                suggestions.  In re Sernaker, 702 F.2d 989, 995, 217 USPQ 1, 6                                                                


                         2Appellants filed an appeal brief on February 9, 1994.  We                                                           
                will refer to this appeal brief as simply the brief.   Appellants                                                             
                filed a reply appeal brief on October 24, 1994.  We will refer to                                                             
                this reply appeal brief as the reply brief.  The Examiner stated                                                              
                in the Examiner’s letter dated September 5, 1996 that the reply                                                               
                brief has been entered and considered but no further response by                                                              
                the Examiner is deemed necessary.                                                                                             
                                                                      4                                                                       





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