Ex parte WITKOWSKI et al. - Page 9




          Appeal No. 96-1142                                                          
          Application 07/939,180                                                      


          case, the examiner has not carried this burden.                             
               For the above reasons, we conclude that the examiner has               
          not carried his burden of establishing a prima facie case of                
          obviousness over Chao of the process recited in any of                      
          appellants’ claims.  Accordingly, the rejection of claims 7-11              
          over Chao is reversed.                                                      
                      Rejection over Henning in view of Hombach                       
               Henning discloses mixtures of aqueous polymer dispersions              
          which include (A) at least one aqueous dispersion having a                  
          film forming temperature below 70EC, with hydrophile groups,                
          preferably a dispersion of polyurethanes having hydrophile                  
          groups, and (B) at least one aqueous dispersion of a polymer                
          which does not form a film below 70EC and which has a melting               
          point greater than 70EC, wherein the weight ratio of                        
          dispersions (A) to (B) is from 97:3 to 50:50, based on the                  
          solids content of the dispersions (pages 2, 3 and 10).  The                 
          mixtures are disclosed as being useful for forming coatings,                
          especially coatings on flexible substrates such as textile                  
          substrates or leather                                                       



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