Ex parte ANDREW T. GRAHAM et al. - Page 2




                 Appeal No. 94-3846                                                                                                                     
                 Application 07/891,376                                                                                                                 



                          This is a decision on an appeal from the final rejection of claims 1 through 11                                               
                 which are all of the claims in the application.                                                                                        
                          The subject matter on appeal relates to a process for preparing a fluid absorbent                                             
                 polymer which comprises isolating polymer particles having hydrophobic surfaces from                                                   
                 the organic phase in which they were formed and coating the polymer particles with a                                                   
                 hydrophilic material in the absence of an organic solvent so as to render the polymer                                                  
                 surface hydrophilic.  Further details of this appealed subject matter are set forth in                                                 
                 illustrative claim 1 which reads as follows:                                                                                           
                          1.  In a process for preparing a fluid absorbent polymer wherein an ethylenically                                             
                 unsaturated monomer mixture is dispersed as droplets in an inert organic phase                                                         
                 containing a hydrophobic suspending agent, such droplets being polymerized to form                                                     
                 polymer particles whereupon a portion of the hydrophobic suspending agent remains                                                      
                 on the surface of the polymer rendering the polymer surface hydrophobic, the                                                           
                 improvement comprising isolating the polymer particles from the organic phase and                                                      
                 coating the polymer particles with a hydrophilic material in the absence of an organic                                                 
                 solvent, such as to render the polymer surface hydrophilic.                                                                            

                          The references relied upon by the examiner’s evidence of obviousness are:                                                     
                 Yamasaki et al. (Yamasaki)                            4,459,396                  Jul. 10, 1984                                         
                 Yasui et al. (Yasui)                                  4,799,911                  Mar.  5, 1991                                         

                          Claims 1 through 11 stand rejected under 35 U.S.C. § 103 as being                                                             
                 unpatentable over Yasui alone or further in view of Yamasaki.                                                                          



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