Ex parte SIEGFRIED R. WISSMANN et al. - Page 3




          Appeal No. 97-0576                                                          
          Application No. 08/308,876                                                  


                    means for heating the thermoplastic material to a                 
          desired temperature as it is blended and advanced along the                 
          material flow path.                                                         
                    The references of record relied upon by the examiner in           
          rejections of the claims under 35 U.S.C.  103 are:                         
          Geier et al. (Geier)     3,023,455                Mar.  6, 1962             
          Schuur                   3,224,739                Dec. 21, 1965             
          Skidmore                 3,738,409                Jun. 12, 1973             
          Gerhards                 3,884,607                May  20, 1975             
          Kertok                   4,502,858                Mar.  5, 1985             
          Loomans                  4,752,135                Jun. 21, 1988             
          Zahradnik                4,913,641                Apr.  3, 1990             
          Brydson et al.(Brydson), "Principles of PLASTICS EXTRUSION,"                
          Applied Science Publishers LTD, London, pp. 95-105 (1973).                  
          Griff, "Plastics Extrusion Technology," 2nd ed., Robert E.                  
          Krieger Publishing Co., New York, pp. 10-11 (1976).                         
                    Claims 3, 5, 6, 8 and 9 stand rejected under 35 U.S.C.            
           103 as being unpatentable over Zahradnik in view of Loomans,              
          any one of Schuur, Geier and Skidmore, and either Brydson or                
          Griff.                                                                      
                    Claim 10 stands rejected under 35 U.S.C.  103 as being           
          unpatentable over Zahradnik in view of Loomans, any one of                  
          Schuur, Geier and Skidmore, either Brydson or Griff, and Kertok.            
                    Claim 7 stands rejected under 35 U.S.C.  103 as being            
          unpatentable over Zahradnik in view of Loomans, any one of                  
          Schuur, Geier and Skidmore, either Brydson or Griff, and                    
          Gerhards.                                                                   

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