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
CA154,222A
Inventor
Jack W. Blake
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.)
FL Jacobs Co
Original Assignee
FL Jacobs Co
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 FL Jacobs CofiledCriticalFL Jacobs Co
Application grantedgrantedCritical
Publication of CA976829ApublicationCriticalpatent/CA976829A/en