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.)
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.)
Sumitomo Cement Co Ltd
Sato Kogyo Co Ltd
Original Assignee
Sumitomo Cement Co Ltd
Sato Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Cement Co Ltd, Sato Kogyo Co LtdfiledCriticalSumitomo Cement Co Ltd
Priority to JP9747082ApriorityCriticalpatent/JPS58213989A/ja
Publication of JPS58213989ApublicationCriticalpatent/JPS58213989A/ja
Publication of JPH0219279B2publicationCriticalpatent/JPH0219279B2/ja