Assignee
ELEKTRO THERMIT GMBH
23 granted patents·186 citations·filing 1975–1998
Top patents by PatentIndex Score
23 records- 0160US6227282B1Process for the aluminothermic welding of rails with alloying of the weld metal in the rail head regionELEKTRO THERMIT GMBH·Filed 1997·Granted May 8, 2001·22 cites·13 claims
- 0255US4250944AProcess for performing aluminothermic rail connection weldings as well as multipart casting mold for performing the processELEKTRO THERMIT GMBH·Filed 1979·Granted Feb 17, 1981·19 cites·3 claims
- 0354US5078200AMethod of cast-welding between finely pearlitized railsELEKTRO THERMIT GMBH·Filed 1991·Granted Jan 7, 1992·15 cites·6 claims
- 0450US4830611AProcess for welding a railway rail, aluminothermic heating blocks for use in the process, and method of making said aluminothermic heating blocksELEKTRO THERMIT GMBH·Filed 1987·Granted May 16, 1989·8 cites·6 claims
- 0550US3976239AProcess for reconditioning worn frogsELEKTRO THERMIT GMBH·Filed 1975·Granted Aug 24, 1976·10 cites·3 claims
- 0649US4522322ASelf-opening closure for a casting crucible used in aluminothermic reactionsELEKTRO THERMIT GMBH·Filed 1983·Granted Jun 11, 1985·10 cites·4 claims
- 0748US5705126AFriction bearing alloyELEKTRO THERMIT GMBH·Filed 1997·Granted Jan 6, 1998·13 cites·5 claims
- 0846US3942579AProcess for the aluminothermic welding of railsELEKTRO THERMIT GMBH·Filed 1975·Granted Mar 9, 1976·11 cites·7 claims
- 0945US4247074ACasting mold for aluminothermically welding rails togetherELEKTRO THERMIT GMBH·Filed 1979·Granted Jan 27, 1981·12 cites·4 claims
- 1043US6120726AAutomatic tapping thimbleELEKTRO THERMIT GMBH·Filed 1998·Granted Sep 19, 2000·4 cites·15 claims
- 1141US4174820AMethod for moving a railway switch and equipment for implementing the methodELEKTRO THERMIT GMBH·Filed 1978·Granted Nov 20, 1979·7 cites·11 claims
- 1240US4589617AFrog for switchesELEKTRO THERMIT GMBH·Filed 1985·Granted May 20, 1986·12 cites·9 claims
- 1337US4634087AGrooved rail switch with a tongue rail deviceELEKTRO THERMIT GMBH·Filed 1984·Granted Jan 6, 1987·9 cites·5 claims
- 1437US4389015ACorrugation-free railELEKTRO THERMIT GMBH·Filed 1980·Granted Jun 21, 1983·6 cites·2 claims
- 1536US5531259AMethod for intermediate cast type welding of finely pearlitized railsELEKTRO THERMIT GMBH·Filed 1994·Granted Jul 2, 1996·5 cites·2 claims
- 1635US6125913AProcess for the aluminothermic welding of rails with alloying of the weld metal in the rail head regionELEKTRO THERMIT GMBH·Filed 1997·Granted Oct 3, 2000·7 cites·8 claims
- 1731US4210300APoint switchELEKTRO THERMIT GMBH·Filed 1979·Granted Jul 1, 1980·3 cites·8 claims
- 1830US5753006AMethod for the aluminothermal production of molten steelELEKTRO THERMIT GMBH·Filed 1996·Granted May 19, 1998·1 cites·2 claims
- 1929US5031365AMethod and apparatus for grinding the running and/or guide surfaces of rails or the likeELEKTRO THERMIT GMBH·Filed 1989·Granted Jul 16, 1991·5 cites·22 claims
- 2028US5944914AAluminothermic mixture with ferrochromium alloyELEKTRO THERMIT GMBH·Filed 1997·Granted Aug 31, 1999·4 cites·10 claims
- 2128US5486245AMethod for raising welded rail connections lying below the traveling surface on railroad tracksELEKTRO THERMIT GMBH·Filed 1994·Granted Jan 23, 1996·2 cites·3 claims
- 2227US5850962ACasting mold for fusion welding of two workpiecesELEKTRO THERMIT GMBH·Filed 1997·Granted Dec 22, 1998·1 cites·14 claims
- 2319US5370726AMetallothermal reaction mixtureELEKTRO THERMIT GMBH·Filed 1993·Granted Dec 6, 1994·0 cites·3 claims
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