Ex parte NAGLE - Page 13




          Appeal No. 1999-0194                                                        
          Application No. 08/436,626                                                  



               Based on the above, the examiner reasonably concluded                  
          that the evidence was sufficient to meet the PTO’s initial                  
          burden of going forward by establishing a prima facie case                  
          that the claimed invention was in public use and/or on sale in              
          this country more than one year prior to the filing date of                 
          the present application.  See In re Caveney, 761 F.2d 671,                  
          674-75, 226 USPQ 1, 3 (Fed. Cir. 1985)(when the issue of                    
          “public use” or “on sale” is raised with respect to a claimed               
          invention in a patent application, the burden on the PTO is                 
          only one of a preponderance of the evidence).                               
                                         II.                                          
               Appellant argues that the foregoing activity did not                   
          constitute a “public use” or “on sale” bar under 35 U.S.C.                  
          § 102(b) “because the Conewago Creek bridge represents an                   
          experimental use or sale of the invention . . . and one stage               
          in a continuing evaluation thereof” (brief, page 7).  In this               
          regard, appellant considers that “the evidentiary record                    
          formed by these two declarations shows that the Conewago Creek              
          bridge was an experimental use and sale of the invention and a              
          part of an evaluation of an invention” (brief, page 8).                     

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