United States Patent RE27592

Publication Date:
03/06/1973
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Primary Class:
558/366
Other Classes:
558/397, 562/429, 560/11, 562/125, 560/124, 568/28, 558/434, 562/506, 558/377
International Classes:
C07C317/04; C07C317/22; C07C317/00