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
CA679916A
Inventor
Borisovich Vol-Epstein Alexander
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.)
INSTITUT GORIUCHIKH ISKOPAIEMYKH AN USSR
Original Assignee
INSTITUT GORIUCHIKH ISKOPAIEMYKH AN USSR
Publication date
Application grantedgrantedCritical
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