Elektro-Thermit GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 192
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 122

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6227282 Process for the aluminothermic welding of rails with alloying of the weld metal in the rail head regionSep 12, 97May 08, 01[B23K]
5370726 Metallothermal reaction mixtureJul 22, 93Dec 06, 94[C21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6125913 Process for the aluminothermic welding of rails with alloying of the weld metal in the rail head regionExpiredSep 09, 97Oct 03, 00[B23K]
6120726 Automatic tapping thimbleExpiredOct 23, 98Sep 19, 00[C21B]
5944914 Aluminothermic mixture with ferrochromium alloyExpiredNov 21, 97Aug 31, 99[B23K]
5850962 Casting mold for fusion welding of two workpiecesExpiredMay 20, 97Dec 22, 98[B23K]
5753006 Method for the aluminothermal production of molten steelExpiredDec 20, 96May 19, 98[C21B]
5531259 Method for intermediate cast type welding of finely pearlitized railsExpiredJun 08, 94Jul 02, 96[B23K]
5486245 Method for raising welded rail connections lying below the traveling surface on railroad tracksExpiredJun 09, 94Jan 23, 96[C21D]
5078200 Method of cast-welding between finely pearlitized railsExpiredFeb 06, 91Jan 07, 92[B23K, B22D]
5031365 Method and apparatus for grinding the running and/or guide surfaces of rails or the likeExpiredNov 27, 89Jul 16, 91[E01B]
4830611 Process for welding a railway rail, aluminothermic heating blocks for use in the process, and method of making said aluminothermic heating blocksExpiredJun 18, 87May 16, 89[F27B]
4589617 Frog for switchesExpiredJan 09, 85May 20, 86[E01B]
4522322 Self-opening closure for a casting crucible used in aluminothermic reactionsExpiredMar 03, 83Jun 11, 85[B22D]
4389015 Corrugation-free railExpiredJun 16, 80Jun 21, 83[B22D]
4250944 Process for performing aluminothermic rail connection weldings as well as multipart casting mold for performing the processExpiredMay 29, 79Feb 17, 81[B22D]
4247074 Casting mold for aluminothermically welding rails togetherExpiredAug 17, 79Jan 27, 81[B23K, B22D]

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