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
CA884352A
Inventor
Lee Chien-Yung
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.)
Cities Service Co
Original Assignee
Cities Service Co
Publication date
Application grantedgrantedCritical
Publication of CA884352ApublicationCriticalpatent/CA884352A/en