Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA872875A
Inventor
Suzui Masaaki
Maeda Tatuo
Otake Michio
Konishi Kozo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denka Co Ltd
Original Assignee
Denki Kagaku Kogyo KK
Publication date
Application grantedgrantedCritical
Publication of CA872875ApublicationCriticalpatent/CA872875A/en