Ex Parte LANDINGHAM - Page 15




          Appeal No. 2000-0920                                                        
          Application No. 08/829,034                                                  


          and dominance.  In re Hammack, 427 F.2d 1378, 1382, 166 USPQ 204,           
          208 (CCPA 1970).  If the scope of the invention sought to be                
          patented cannot be determined from the language of the claims               
          with a reasonable degree of certainty, a rejection of the claims            
          under 35 U.S.C. § 112, second paragraph, is appropriate.  In re             
          Venezia, 530 F.2d 956, 958, 189 USPQ 149, 151 (CCPA 1976).                  
               In the present case, while claims 11-18 require that the               
          implant be fabricated from an FDA approved cermet, the underlying           
          specification offers no guidance whatsoever as to precisely what            
          constitutes an FDA approved cermet.  While it might perhaps be              
          possible to consult a list compiled by the United States Food and           
          Drug Administration, if such a listing exists, as to what cermets           
          are or are not approved for use as an implant material at any               
          given time, it is reasonable to assume that said list would be              
          subject to change over time, as when approval is granted (or                
          withdrawn) upon further consideration by the FDA.  Furthermore,             
          while it may be argued that the terminology in question is with             
          reference to those cermets that appear on an FDA approved list as           
          of a particular date,5 there is no indication in the record                 
          before us of what that date may be.  In light of these                      


               5For example, the filing date of the application.                      
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