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                        3491513
                    
                                            
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                                    Patent number 3,491,513
                                
 
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                                    Issue date Jan 27, 1970
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        3388993
                    
                                            
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                                    Patent number 3,388,993
                                
 
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                                    Issue date Jun 18, 1968
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        3373000
                    
                                            
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                                    Patent number 3,373,000
                                
 
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                                    Issue date Mar 12, 1968
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        3288561
                    
                                            
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                                    Patent number 3,288,561
                                
 
                                - 
                                    Issue date Nov 29, 1966
                                
 
                        
                                                                
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                                    C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
                                 
                        
                 
             
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                        3249399
                    
                                            
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                                    Patent number 3,249,399
                                
 
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                                    Issue date May 3, 1966
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        3026179
                    
                                            
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                                    Patent number 3,026,179
                                
 
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                                    Issue date Mar 20, 1962
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        2970887
                    
                                            
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                                    Patent number 2,970,887
                                
 
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                                    Issue date Feb 7, 1961
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        2949424
                    
                                            
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                                    Patent number 2,949,424
                                
 
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                                    Issue date Aug 16, 1960
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        2928720
                    
                                            
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                                    Patent number 2,928,720
                                
 
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                                    Issue date Mar 15, 1960
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        2910357
                    
                                            
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                                    Patent number 2,910,357
                                
 
                                - 
                                    Issue date Oct 27, 1959
                                
 
                        
                                                                
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                                    C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
                                 
                        
                 
             
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                        1382921
                    
                                            
                                - 
                                    Patent number 1,382,921
                                
 
                                - 
                                    Issue date Jun 28, 1921
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        1382920
                    
                                            
                                - 
                                    Patent number 1,382,920
                                
 
                                - 
                                    Issue date Jun 28, 1921
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY
                                 
                        
                 
             
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                        1382922
                    
                                            
                                - 
                                    Patent number 1,382,922
                                
 
                                - 
                                    Issue date Jun 28, 1921
                                
 
                        
                                                                
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                                    C01 - INORGANIC CHEMISTRY