Ex parte EVANS et al. - Page 1




               The opinion in support of the decision being entered today was not     
               written for publication and is not binding precedent of the Board.     
                                                                 Paper No. 11         
                       UNITED STATES PATENT AND TRADEMARK OFFICE                      
                                     ____________                                     
                          BEFORE THE BOARD OF PATENT APPEALS                          
                                   AND INTERFERENCES                                  
                                     ____________                                     
                            Ex parte JOSEPH T. EVANS, JR.,                            
                                WILLIAM L. WARREN, and                                
                                    BRUCE A. TUTTLE                                   
                                     ____________                                     
                                 Appeal No. 1997-3915                                 
                              Application No. 08/640,572                              
                                     ____________                                     
                                       ON BRIEF                                       
                                     ____________                                     
          Before THOMAS, JERRY SMITH, and GROSS, Administrative Patent                
          Judges.                                                                     

          GROSS, Administrative Patent Judge.                                         



                                  DECISION ON APPEAL                                  
               This is a decision on appeal from the examiner's final                 
          rejection of claim 1, which is the only claim pending in this               
          application.                                                                
               Appellants' invention relates to a ferroelectric FET                   
          structure having a ferroelectric layer doped to reduce retention            
          loss.  In particular, the ferroelectric layer has a perovskite              
          structure with A and B sites and has a chemical composition of              





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