Ex Parte Hwang et al - Page 3




             Appeal No. 2002-2055                                                             Page 3               
             Application No. 09/727,547                                                                            


             applied as a reference.  They cited no legal precedent supporting this conclusion.  We                
             decided that the argument was contrary to 35 U.S.C. § 119(e)(1) and 35 U.S.C. § 120.                  
                    We have carefully reviewed the arguments presented in the Request for                          
             Rehearing, which can be summarized as follows: (1) “the properly filed provisional                    
             application is a constructive reduction to practice for all time, regardless of the                   
             abandonment thereof” (Request, page 2); (2) “there is nothing in the statute to later void            
             such reduction to practice even though the provisional application be abandoned”                      
             (Request, page 3); and (3) this removes Comita as an available reference (Request,                    
             page 3).  However, we are not persuaded that our decision was in error, and we shall                  
             not modify it.                                                                                        
                    Support for our conclusion is provided by our reviewing court in In re Costello                
             and McClean, 717 F.2d1346, 1349, 219 USPQ 389 (Fed. Cir. 1983), which was cited by                    
             the examiner on page 8 of the Answer.  The situation before the court was analogous to                
             that before us, in that while the appellants did not satisfy the requirements of the                  
             Section 120, they still wished to eliminate a reference by virtue of a constructive                   
             reduction to practice based upon an earlier abandoned application.  The Court makes                   
             the following statements, which support our conclusion in the instant case:                           
                    Rule 131 requires proof of either “reduction to practice prior to the                          
                    effective date of the reference, or conception of the invention prior to the                   
                    effective filing date of the reference coupled with due diligence from said                    
                    date to a subsequent reduction to practice or to the filing of the                             
                    application.”                                                                                  








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