Ex parte BARTHEL et al. - Page 7




          Appeal No. 97-2723                                                          
          Application 08/320,091                                                      


          upon the examiner to establish a factual basis to support the               
          legal conclusion of obviousness.  See In re Fine, 837 F.2d                  
          1071, 1073, 5 USPQ2d 1596, 1598 (Fed. Cir. 1988).  In so                    
          doing, the examiner is expected to make the factual                         
          determinations set forth in Graham v. John Deere Co., 383 U.S.              
          1, 17, 148 USPQ 459, 467 (1966), and to provide a reason why                
          one having ordinary skill in the pertinent art would have been              
          led to modify the prior art or to combine prior art references              
          to arrive at the claimed invention.  Such reason must stem                  
          from some teaching, suggestion or implication in the prior art              
          as a whole or knowledge generally available to one having                   
          ordinary skill in the art.  Uniroyal, Inc. v. Rudkin-Wiley                  
          Corp., 837 F.2d 1044, 1051, 5 USPQ2d 1434, 1438 (Fed. Cir.),                
          cert. denied, 488 U.S. 825 (1988); Ashland Oil, Inc. v. Delta               
          Resins & Refractories, Inc., 776 F.2d 281, 293,                             
          227 USPQ 657, 664 (Fed. Cir. 1985), cert. denied, 475 U.S.                  
          1017 (1986); ACS Hosp. Sys., Inc. v. Montefiore Hosp., 732                  
          F.2d 1572, 1577, 221 USPQ 929, 933 (Fed. Cir. 1984).  These                 
          showings by the examiner are an essential part of complying                 
          with the burden of presenting a prima facie case of                         
          obviousness.  Note In re Oetiker, 977 F.2d 1443, 1445, 24                   
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