Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21C - Mining or quarrying
More topics under "E21C - Mining or quarrying" (17,850)
E21C 25 - Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam (2,629)
E21C 27 - Machines which completely free the mineral from the seam (1,602)
E21C 29 - Propulsion of machines for slitting or completely freeing the mineral from the seam (839)
E21C 31 - Driving means incorporated in machines for slitting or completely freeing the mineral from the seam (738)
E21C 33 - Trucks or other devices for transporting machines for slitting or completely freeing the mineral from the seam (47)
E21C 35 - Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups , or (6,127)
E21C 37 - Other methods or devices for dislodging with or without loading (1,249)
E21C 39 - Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools (220)
E21C 41 - Methods of underground or surface mining; Layouts therefor (2,789)
E21C 45 - Methods of hydraulic mining; Hydraulic monitors (347)
E21C 47 - Machines for obtaining, or the removal of, materials in open-pit mines (773)
E21C 49 - Obtaining peat; Machines therefor (68)
E21C 50 - Obtaining minerals from underwater, not otherwise provided for (408)
E21C 51 - Apparatus for, or methods of, winning materials from extraterrestrial sources (14)
Patents for E21C - Mining or quarrying (121)
04/1985
04/16/1985CA1185594A1 Drill cuttings conveying apparatus with flexible duct for improved ground clearance
07/1984
07/17/1984CA1171072A1 Rock bit
08/1983
08/23/1983US4400035 Process for the extraction of thick coal seams
06/1983
06/14/1983CA1148107A1 Reclaiming apparatus
05/1983
05/10/1983CA1146156A1 Drill head assembly
12/1982
12/28/1982CA1138212A1 Method of sealing salina excavations
09/1982
09/21/1982US4350392 Coal extraction in a longwall working
01/1982
01/26/1982CA1116871A1 Process for extracting nickel from pre-reduced lateritic ore
01/12/1982CA1116187A1 Method and apparatus for mining uranium deposits of variable concentrations
11/1981
11/17/1981US4301125 Comprising peroxymonosulfuric acid
05/1981
05/19/1981CA1101407A1 Drill string
10/1980
10/28/1980US4230019 Fluid arrangement
07/1980
07/08/1980CA1081266A1 Method for the segmented mining and drying of bentonite
03/1980
03/04/1980CA1072859A1 Hydraulic reciprocating machines
12/1979
12/04/1979CA1067482A1 Rock drilling rigs
11/1979
11/13/1979CA1066310A1 Method of extracting coal
02/1979
02/13/1979CA1048487A1 Mounting for rock drills
01/1979
01/16/1979CA1046497A1 Rotary rock bit with multiple row coverage for very hard formations
10/1978
10/17/1978US4120368 Supplying motive fluid to below ground tool drive from a pressurized bore hole
07/1978
07/04/1978CA1034111A1 Hammer drills
11/1977
11/22/1977US4059279 Hollow percussion drill rod with seal for cleaning fluid inlet tube
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