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Extract from the Register of European Patents

EP Citations: EP0868912

Cited inSearch
Type:Patent literature
Publication No.:BE662884  [A]
 (MERCK AG) [A] 1-8* claims 1,3 *;
Type:Patent literature
Publication No.:US3935326  [A]
 (GROPPENBACHER GREGOR, et al) [A] 1-8 * column 9 - column 10; example 4 *;
Type:Patent literature
Publication No.:DE2612889  [A]
 (BASF AG) [A] 1-8 * column 4; example 3 *