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
CA666724A
Inventor
P. Thomas Royle
T. Nielsson Francis
C. Engibous James
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.)
International Minerals and Chemical Corp
Original Assignee
International Minerals and Chemical Corp
Publication date
Application grantedgrantedCritical
Publication of CA666724ApublicationCriticalpatent/CA666724A/en