| US3161604A
              (en)
            
            * |  | 1964-12-15 |  | Novel copper containing polymerization | 
        
          | NL203326A
              (en:Method)
            
            * | 1955-01-05 |  |  |  | 
        
          | LU34811A1
              (en:Method)
            
            * | 1955-12-09 |  |  |  | 
        
          | IT569840A
              (en:Method)
            
            * | 1956-04-06 |  |  |  | 
        
          | LU35350A1
              (en:Method)
            
            * | 1956-08-06 |  |  |  | 
        
          | BE559859A
              (en:Method)
            
            * | 1956-08-07 |  |  |  | 
        
          | BE559674A
              (en:Method)
            
            * | 1956-08-08 |  |  |  | 
        
          | DE1060856B
              (de)
            
            * | 1956-10-03 | 1959-07-09 | Roehm & Haas Gmbh | Verfahren zur Reinigung, vornehmlich Trocknung ungesaettigter polymerisierbarer Verbindungen | 
        
          | US3063798A
              (en)
            
            * | 1956-12-20 | 1962-11-13 | Exxon Research Engineering Co | Alpha olefin polymerization catalysts | 
        
          | GB877050A
              (en)
            
            * | 1958-06-16 | 1961-09-13 | Ici Ltd | Improvements in and relating to the polymerisation of olefines, catalysts for such polymerisation, crystalline materials suitable as components of the catalysts and processes for their preparation | 
        
          | NL223943A
              (en:Method)
            
            * | 1957-01-10 |  |  |  | 
        
          | BE564245A
              (en:Method)
            
            * | 1957-02-15 |  |  |  | 
        
          | GB860647A
              (en)
            
            * | 1957-03-04 | 1961-02-08 | Exxon Research Engineering Co | Method for preparing titanium trichloride containing polymerization catalyst and polymerization process | 
        
          | NL228165A
              (en:Method)
            
            * | 1957-05-28 |  |  |  | 
        
          | BE568072A
              (en:Method)
            
            * | 1957-05-29 |  |  |  | 
        
          | BE569387A
              (en:Method)
            
            * | 1957-07-12 |  |  |  | 
        
          | BE572307A
              (en:Method)
            
            * | 1957-10-23 |  |  |  | 
        
          | DE1128662B
              (de)
            
            * | 1957-11-09 | 1962-04-26 | Ruhrchemie Ag | Verfahren zur Herstellung von Polyolefinen | 
        
          | US3049529A
              (en)
            
            * | 1957-11-12 | 1962-08-14 | Phillips Petroleum Co | Process for production of olefin polymers | 
        
          | NL235349A
              (en:Method)
            
            * | 1958-01-31 |  |  |  | 
        
          | US3121064A
              (en)
            
            * | 1958-01-31 | 1964-02-11 | Hoechst Ag | Hydrogen halide activation of ticl4-alkyl aluminum halide catalysts | 
        
          | US3184416A
              (en)
            
            * | 1958-05-22 | 1965-05-18 | Monsanto Co | Production of ziegler polymerization catalysts | 
        
          | US3069446A
              (en)
            
            * | 1958-12-03 | 1962-12-18 | Exxon Research Engineering Co | Titanium halide derivatives | 
        
          | US3125558A
              (en)
            
            * | 1959-02-17 | 1964-03-17 |  | Organoaluminum-transition -metal ha- | 
        
          | US3078144A
              (en)
            
            * | 1959-03-09 | 1963-02-19 | Exxon Research Engineering Co | Method for preparing purified titanium trichloride | 
        
          | US3139419A
              (en)
            
            * | 1959-07-17 | 1964-06-30 | Exxon Research Engineering Co | Cocrystallized aluminum chloridevanadium chloride-titanium chloride polymerization catalyst | 
        
          | US3026311A
              (en)
            
            * | 1959-08-14 | 1962-03-20 | Eastman Kodak Co | Olefin polymerization using catalysts containing organic sulfur compounds | 
        
          | NL255916A
              (en:Method)
            
            * | 1959-09-23 | 1900-01-01 |  |  | 
        
          | BE598685A
              (en:Method)
            
            * | 1959-12-31 |  |  |  | 
        
          | NL266251A
              (en:Method)
            
            * | 1960-07-01 |  |  |  | 
        
          | US3228892A
              (en)
            
            * | 1960-12-29 | 1966-01-11 | Texaco Inc | Method for preparing supported catalytic structures | 
        
          | US3177189A
              (en)
            
            * | 1961-01-27 | 1965-04-06 | Allied Chem | Polymerization promoter | 
        
          | US3491073A
              (en)
            
            * | 1965-08-13 | 1970-01-20 | Dow Chemical Co | Process for the polymerization of olefins |