Ex parte NIX et al. - Page 2




          Appeal No. 1997-3142                                                        
          Application No. 08/323,660                                                  


          of overcoming all of the rejections under 35 U.S.C.  112                   
          (paper number 13).  Accordingly, claims 1, 5, 6, 10 and 12                  
          through 15 remain before us on appeal.                                      
               The disclosed invention relates to a method and apparatus              
          for substantially simultaneously determining amounts of CO ,                
                                                                    2                 
          O , and N  gases dissolved in a liquid sample.2      2                                                                   
               Claim 1 is illustrative of the claimed invention, and it               
          reads as follows:                                                           
               1.  A method for substantially simultaneously determining              
          amounts of CO , O  and N  gases dissolved in a liquid sample,2  2      2                                                    
          comprising the steps of:                                                    
               (a) evacuating a sample cell, including a phosphorescent               
          material capable of being excited by primary light to emit                  
          secondary light, via vacuum pressure;                                       
               (b) extracting a gas sample from the liquid sample, the                
          extracted gas sample then entering the evacuated sample cell;               
               (c) transmitting infrared (IR) radiation, at at least one              
          wavelength absorbed by CO  gas, through the extracted gas                   
                                   2                                                  
          sample in the sample cell;                                                  
               (d) transmitting primary light into the phosphorescent                 
          material in the sample cell;                                                
               (e) measuring an amount of IR radiation absorbed as an                 
          indication of the concentration of CO  gas in the gas sample;               
                                               2                                      
               (f) measuring, substantially simultaneous to step (e),                 
          an amount of secondary light emitted by the phosphorescent                  
          material, quenched by O  in the gas sample, as an indication                
                                 2                                                    
          of the concentration of O  gas in the gas sample, the                       
                                   2                                                  
                                          2                                           





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