Ex parte PURVIS et al. - Page 5



          Appeal No. 1997-0218                                                        
          Application No. 08/182,757                                                  

          silane is further disposed on either side of the polyvinyl                  
          chloride film and acts as an adhesion promoter between the                  
          film and the glass sheets.                                                  
               Beckmann discloses a laminated safety glass comprising a               
          plasticized polyvinyl chloride film bonded on each side to a                
          glass plate with the aid of an organofunctional silane.                     
          Preferred silanes include "alkylene alkoxysilanes containing                
          amino and/or imino or epoxy groups, one or both of the                      
          hydrogen atoms of the amino group being replaced by an amino                
          or hydroxyalkyl of polyamino moiety" (col. 5, lines 38-43).                 
          However, in Example 5, for purposes of comparison, Beckmann                 
          discloses a laminated glass wherein the plasticized polyvinyl               
          chloride film is bonded on each side to a glass plate using a               
          gamma mercaptopropyltrimethoxysilane (see Table III; see also               
          Example 14).  Therefore, the teachings of Beckmann alone                    
          satisfy the limitations of claim 42.  See In re Gurley, 27                  
          F.3d 551, 553, 31 USPQ2d 1130, 1132 (Fed. Cir. 1994) ("A known              
          or obvious composition does not become patentable simply                    
          because it has been described as somewhat inferior to some                  
          other product for the same use.").                                          



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