Ex parte YUAN - Page 14

          Appeal No. 1997-0461                                                         
          Application 08/267,683                                                       

          that the examiner bears the initial burden of making out a                   
          prima facie case of obviousness. This the examiner has not                   
          done with respect to claims 28, 29 and 31 and we know of no                  
          reason why it would have been obvious to substitute for the                  
          aqueous soap liquid carrier of the prior art references an                   
          entirely non-aqueous liquid as claimed in claims 28, 29 and                  
          31. Accordingly, on this record, the stated rejection of                     
          claims 28, 29 and 31 is reversed.                                            
                                     OTHER ISSUES                                      
               We observe that claims 28, 29 and 31 are directed to                    
          "lubricant/coolant" compositions consisting essentially of a                 
          molybdenum disulfide dispersion in a liquid which consists                   
          essentially of kerosene, chloroparaffin and carbon                           
          tetrachloride. According to appellant's disclosure at page 15,               
          lines 8 through 10, carbon tetrachloride comprises from 3 to 5               
          percent of the "lubricant/coolant".                                          
               We take official notice of the following facts. Carbon                  
          tetrachloride is toxic by ingestion, inhalation and skin                     
          absorption. The narcotic tolerance of carbon tetrachloride is                
          5 ppm in air. Carbon tetrachloride decomposes to phosgene and                
          hydrochloric acid at high temperatures and is a known                        


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