Ex parte GAPCO - Page 14

          Appeal No. 1999-1480                                                        
          Application No. 08/523,330                                                  

          properties of the thermoexpansive material itself to provide a              
          clamping force.  While the nut and bolt of Taylor may have                  
          some thermoexpansive properties it is clear to us that such a               
          mechanical clamping structure would not be viewed by one of                 
          ordinary skill in the art as being a “thermoexpansive clamping              
          structure” like that set forth in claim 52 on appeal for                    
          providing a clamping force of the type described by appellant               
          to a key.                                                                   

               In light of the foregoing, we will not sustain the                     
          standing  103 rejection of independent claim 52 and claims                 
          53-56 which depend therefrom.                                               

               Next we turn to the rejections of claims 57-62 under 35                
          U.S.C.  103 as being unpatentable over McRae in view of                    
          Thomas.  Looking first to the examiner’s rejection of                       
          appellant’s claims 57-59 based on McRae and Thomas, we note                 
          the examiner’s position that McRae shows the key holding                    
          apparatus substantially as claimed.  In this instance what the              
          examiner finds lacking in McRae is a key attachment structure               
          comprising a “resilient directional retention structure.”  To               

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