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
CA740270A
Inventor
B. Walker Alan
Philip B. Crommelin, Jr.
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.)
Research Cottrell Inc
Original Assignee
Research Cottrell Inc
Publication date
Application grantedgrantedCritical
Publication of CA740270ApublicationCriticalpatent/CA740270A/en