Ex parte STEPHENS - Page 4




                 Appeal No.  96-2884                                                                                                                    
                 Application No. 08/181,997                                                                                                             

                                   During examination "claims in an application are to be given their                                                   
                 broadest reasonable interpretation consistent with the specification.” In re Sneed, 710                                                
                 F. 2d 1544, 1548, 218 USPQ 385, 388 (Fed. Cir. 1983) ( emphasis added).  Claim                                                         
                 definiteness depends on whether the inventor's claim language conveys to those                                                         
                 skilled in the art the scope of coverage.  In re Credle, 25 F.3d, 1566, 1576, 30 USPQ2d                                                
                 1911, 1919 (Fed. Cir. 1994).                                                                                                           
                                   As to claims 18, 19, 34, 38 and 39 the examiner contends that the phrase                                             
                 “an equilibrium concentration “ is unclear as to its meaning or the basis for determining                                              
                 it.  The examiner believes that perhaps appellants meant to say “the equilibrium                                                       
                 concentration”.                                                                                                                        
                                   We cannot agree with the examiner  that the expression “an equilibrium                                               
                                                     3                                                                                                  
                 concentration” is indefinite .  One of ordinary skill in the art would understand the                                                  
                 meaning of “an equilibrium concentration” with respect to the first gas, hydrogen, and a                                               
                 second gas in that the individual named gases and implicitly other gas components will                                                 
                 react to produce a balance of gases in the system.                                                                                     
                                   As to claim 18, the examiner also contends that the phrase “further                                                  
                 comprises” implies more gas but “no more than” still includes zero, and thus claim 18 is                                               


                                   3  In the event of further prosecution, the examiner should consider                                                 
                 whether the expression “an equilibrium concentration” of two gases satisfies the                                                       
                 description requirement or whether the expression is broader than the enabling                                                         
                 disclosure (35 U.S.C. § 112, first paragraph).                                                                                         
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