United States Patent RE27281

Publication Date:
02/15/1972
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Primary Class:
528/34
Other Classes:
556/436, 512/21, 556/427, 528/43, 528/42, 512/20, 512/11, 556/428, 528/28
International Classes:
C07F7/08; C08G77/14; C08G77/22; C07F7/00; C08G77/00