Beschreibung     Ansprüche  

US2891920A   [0002]  [0005] 
DE1495512   [0003]  [0004] 
JP2002037888A   [0005]  [0011] 
JP2000095661A   [0005] 
JP2006117868A   [0006]  [0011] 
EP1017745A   [0041] 
DE19742759A   [0041] 

Ullmann's Encyclopedia of Industrial Chemistry   [0031]