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.)
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.)
MACHT WALTER D
MOORE HELEN B
THAYER HELEN M
Original Assignee
MACHT WALTER D
MOORE HELEN B
THAYER HELEN M
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
Priority claimed from CA216,734Aexternal-prioritypatent/CA1034867A/fr
Application filed by MACHT WALTER D, MOORE HELEN B, THAYER HELEN MfiledCriticalMACHT WALTER D
Priority to CA302,917ApriorityCriticalpatent/CA1063012A/fr
Application grantedgrantedCritical
Publication of CA1063012ApublicationCriticalpatent/CA1063012A/fr
Способ формирования горизонтальной системы дренажа для добычи газа, способ бурения дренажных буровых скважин и способ добычи газа из угольного пласта (варианты)
Podziemny wzór odwiertu dla uzyskiwania dostępu do obszaru strefy podziemnej z powierzchni, sposób uzyskiwania dostępu do obszaru strefy podziemnej oraz układ do uzyskiwania dostępu do strefy podziemnej z powierzchni