Ex Parte CHEN et al - Page 3




             Appeal No. 1997-3729                                                                    3               
             Application No. 08/362,107                                                                              


                                                Z1SO2SM1                                                             
                    wherein                                                                                          

                    ZI is alkyl, aryl, heteroaryl, arylalkyl, or a polymeric backbone wherein the                    
             thiosulfonate group is repeated and                                                                     

                    M1 is a monovalent metal or a tetraalkylammonium cation, and                                     
                    Formula II is                                                                                    
                                                Z2SO2M2             (II)                                             
                    wherein                                                                                          

                    Z2 is alkyl, aryl, heteroaryl, arylalkyl, or a polymeric backbone wherein the sulfinate          
             group is repeated and                                                                                   

                    M2 is a monovalent metal or a tetraalkylammonium cation, and wherein iodide                      
             forming the grains is confined to exterior portions of the grains accounting for up to 15               
             percent of total silver.                                                                                
             6.     A radiation sensitive emulsion according to Claim 1 wherein the silver iodochloride              
                    grains include tetradecahedral grains having {111} and {100} crystal faces.                      
             11.  The emulsion of Claim 1 wherein said silver iodochloride grains comprise about                     
                    99% silver chloride.                                                                             
                                        THE REFERENCES OF RECORD                                                     
             As evidence of obviousness, the examiner relies upon the following references.                          
             Takada et al. (Takada)             5,389,508                  Feb. 14, 1995                             
             Lok                                5,399,479                  Mar. 21, 1995                             
             Shuto et al. (Shuto)               5,110,719                  May.   5, 1992                            
             MacIntyre et al. (MacIntyre)       5,411,855                  May.   2, 1995                            
             Hei (Kokai Patent Application)     3-208,041                  Sep. 11, 1991                             
             (English language Translation)                                                                          







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