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.)
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Union Carbide Corp
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Union Carbide Corp
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Application filed by Union Carbide CorpfiledCriticalUnion Carbide Corp
Priority to FR805387ApriorityCriticalpatent/FR1236256A/fr
Application grantedgrantedCritical
Publication of FR1236256ApublicationCriticalpatent/FR1236256A/fr
E21C27/00—Machines which completely free the mineral from the seam
E21C27/20—Mineral freed by means not involving slitting
E21C27/22—Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills, i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type
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Engineering & Computer Science
(AREA)
Mining & Mineral Resources
(AREA)
Mechanical Engineering
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Life Sciences & Earth Sciences
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General Life Sciences & Earth Sciences
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Geochemistry & Mineralogy
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Geology
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FR805387A1959-09-171959-09-17Dispositif de coupe pour machines d'exploitation des mines
ExpiredFR1236256A
(fr)