VOEST-ALPINE AKTIENGESELLSCHAFT

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6264722 Process for producing liquid pig iron or intermediate steel products and installation for implementing itExpiredJan 20, 98Jul 24, 01[C21B]
4960439 Arrangement for gasifying fuelsExpiredAug 12, 88Oct 02, 90[C10J]
4913733 Process for producing pig ironExpiredOct 17, 89Apr 03, 90[C21B]
4889323 Mill arrangement with primary gas mixing meansExpiredJul 30, 87Dec 26, 89[F27B]
4880489 Apparatus for plasma etching circuit boards or the likeExpiredAug 26, 86Nov 14, 89[C23F]
RE33036 Closure mechanism with gas sealExpiredNov 25, 87Aug 29, 89[B22D]
4840310 Fuel injection nozzleExpiredOct 26, 87Jun 20, 89[F02M]
4805963 Shield advancing machineExpiredOct 01, 86Feb 21, 89[F21D]
4789469 Apparatus for continuously introducing or removing gases into and/or from liquidsExpiredDec 04, 86Dec 06, 88[B01F, C02F]
4786112 Driving arrangement for driving the cutting rolls of a drift advancing machineExpiredJul 16, 87Nov 22, 88[E21C]
4784439 Movable cutting machineExpiredOct 25, 82Nov 15, 88[E21C]
4778221 Movable device for openpit miningExpiredJun 01, 87Oct 18, 88[E21C]
4776445 Device for transferring the cup heap of debris onto a drift conveying meansExpiredSep 24, 86Oct 11, 88[B65G]
4766098 Method of protecting a coal gasifier part from attack by liquid slagsExpiredFeb 19, 87Aug 23, 88[C04B]
4747729 Movable trestleExpiredJan 12, 87May 31, 88[E21D]
4747730 Trestle being displaceable on caterpillarExpiredJan 08, 87May 31, 88[E21D]
4747741 Device for closing the charging opening for pressure resistant containersExpiredDec 20, 82May 31, 88[C10B]
4741827 Apparatus for separating of liquid films floating on liquidsExpiredMay 23, 86May 03, 88[E02B]
4741837 Process for drying brown coal of high water contentExpiredNov 05, 86May 03, 88[C02F]
4740240 Smelting process for recovering metals from fine-grained non-ferrous metal sulfide ores or concentratesExpiredAug 02, 85Apr 26, 88[C22B]

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