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
CA193,760A
Inventor
Tsuyoshi Saito
Kiro Asano
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.)
Kureha Corp
Original Assignee
Kureha Corp
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 Kureha CorpfiledCriticalKureha Corp
Priority to CA193,760ApriorityCriticalpatent/CA1020576A/en
Application grantedgrantedCritical
Publication of CA1020576ApublicationCriticalpatent/CA1020576A/en