Ex parte VISHWAKARMA et al. - Page 2

               Appeal No. 94-4495                                                                                                  
               Application 07/865,165                                                                                              

                                                 The Claimed Subject Matter                                                        
                       The claims on appeal are directed to a process for preparing a binary sensitizing dye                       
               compound.  Claims 1 and 3 are illustrative of the claimed subject matter:                                           
                              1.  A process for the preparation of binary sensitizing dyes comprising reacting                     
                       a solution of two dye compounds, one of which contains a carboxyl and the other of                          
                       which  contains  an  amino  or  a  hydroxyalkyl,  in  the  presence  of  a  2-halo-1-1-                     
                       alkylpyridinium salt and a 4-dialkylaminopyridine so that the two dye compounds                             
                       undergo a dehydrative condensation reaction.                                                                
                              3.  A process according to claim 1 wherein one of said dye compounds can                             
                       adsorb to a silver halide grain surface and the other of said dye compounds is                              
                       substantially non-adsorbable to a silver halide grain surface, and the resulting binary                     
                       sensitizing dye is of general formulas (I), (II), or (III)                                                  


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