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公开(公告)号：US2804485A
公开(公告)日：1957-08-27
申请号：US56969456
申请日：1956-03-06
Applicant: KARL ZIEGLER , KLAUS HAFNER , HELMUT WELDES
Inventor： KARL ZIEGLER , KLAUS HAFNER , HELMUT WELDES
CPC classification number: C07C13/52 , C07C1/325 , C07C2/86 , C07C2602/30 , Y10S585/931
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