Ex Parte Haas et al - Page 9


                Appeal 2007-2985                                                                             
                Application 010/669,978                                                                      
           1    (unpatented claims given broadest reasonable construction consistent with                    
           2    specification).                                                                              
           3          The claims require that the aqueous hydrogen peroxide solution have                    
           4    less than 50 wppm of alkali metal, alkaline earth metals or amines with a pkB                
           5    less than 4.5.                                                                               
           6          Nothing in the specification requires that an alkali metal, an alkaline                
           7    earth metal or an amine with a pkB less than 4.5 be present in the claimed                   
           8    composition.                                                                                 
           9          Accordingly, the claim requires only aqueous hydrogen peroxide and                     
          10    an anion, e.g., a stabilizer.                                                                
          11          The claim is broad enough to read on the following composition:  an                    
          12    aqueous hydrogen peroxide solution comprising water, hydrogen peroxide                       
          13    and at least 100 wppm [based on the hydrogen peroxide] of anions.                            
          14                                                                                                 
          15                               Applicability of Tsao                                             
          16          Tsao differs, if at all, in that the unstabilized dilute hydrogen peroxide             
          17    described by Tsao arguably does not have anions, e.g., a stabilizer.                         
          18          However, Tsao turns right around and says one skilled in the art                       
          19    would use a stabilizer.                                                                      
          20          The Tsao revelations are totally consistent with the representations by                
          21    Haas in the Haas specification that stabilizers are known to be used in                      
          22    aqueous hydrogen peroxide solutions to prevent decomposition.                                
          23    Specification ¶¶ 0025, 0035 and 0036.                                                        
          24          On this record it is abundantly clear that one skilled in the art would                
          25    know (1) the need for a stabilizer in an aqueous solution of hydrogen                        


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