Ex Parte McNamara et al - Page 9



               Appeal 2007-3373                                                                             
               Application 10/477,363                                                                       
           1                                                                                                
           2          One skilled in the art knows that hydroxyl and amino containing                       
           3   compounds will react with acid groups to covalently bond.  For example, a                    
           4   Berg alcohol with a hydroxyl group (R1) would be expected to be bonded to                    
           5   the acid group of a Berg dendrimer (R2) to form an ester group:                              
           6                R1―OH + R2―COOH   →   R1―COO―R2 + H20                                           
           7          A Berg amine with an amino group (R3) would be expected to be                         
           8   bonded to the acid group of a Berg dendrimer (R2) to form an amido group:                    
           9               R3―NH2 + R2―COOH   →   R3―NHCO―R2 + H20                                          
          10          Suitable modifying compounds include aliphatic alcohols, phenols,                     
          11   and fatty acids.  Col. 3:42-46.                                                              
          12          Berg tells one skilled in the art that additives can be present in the                
          13   dendrimer.  Col. 5:21.                                                                       
          14          The additive may enter into an interaction with groups which are                      
          15   present in the dendrimer.  Col. 5:13-14.                                                     
          16          Additives include benzophenones, phenols and amines, e.g., 2,6-di-t-                  
          17   butyl-4-methylphenol (col. 5:43), 2-hydroxy-4-n-octoxybenzophenone                           
          18   (col. 5:47) and N,N-di(2,2,6,6-tetramethyl)-4-piperidyl)-hexamethylene-                      
          19   diamine (col. 5:54).                                                                         
          20          The dendrimer can have more than one additive.  Col. 5:29-30.                         
          21          Berg does not describe a reaction product of a carboxy-functional                     
          22   additive with poly(ethylene glycol)-monomethyl ether and                                     
          23   dimethylolpropionic acid.                                                                    




                                                     9                                                      

Page:  Previous  1  2  3  4  5  6  7  8  9  10  11  12  13  14  Next

Last modified: September 9, 2013