Demag A.G.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6612364 Continuous casting method with soft reductionExpiredMar 09, 01Sep 02, 03[B22D]
4300641 Torque responsive, dual speed rotary power driverExpiredFeb 21, 79Nov 17, 81[B25B]
4286738 Revolving tower support for casting ladlesExpiredFeb 19, 80Sep 01, 81[B22D]
4273348 Roll stabilizing apparatus for vehiclesExpiredFeb 23, 79Jun 16, 81[B62D]
4270738 Casting ladle mounting for steel strand casting plantsExpiredJun 25, 79Jun 02, 81[C21B]
4256168 Cooling spray nozzle adjusting arrangement particularly for steel strand casting plantsExpiredJun 25, 79Mar 17, 81[B22D]
4252180 Pressure relief apparatus for the supporting beam for metal strand casting plants, particularly curved steel strand casting plantsExpiredJan 15, 79Feb 24, 81[B22D]
4235623 Continuous smelting method for ferrochromeExpiredMay 02, 79Nov 25, 80[C22C]
4235082 Detachable overload control coupling between rotating machine elementsExpiredAug 24, 78Nov 25, 80[F16D]
4227636 Supporting roller stand for steel slab strand casting plants, particularly for curved slab strand casting plantsExpiredSep 28, 76Oct 14, 80[B65H]
4221171 Direction shift control for connected vehicle undercarriagesExpiredJul 17, 78Sep 09, 80[E01B]
4219694 Insulated mounting for live railsExpiredNov 09, 78Aug 26, 80[H01B, B60M]
4215852 Apparatus for locking a converter tilting gear during a blasting operationExpiredDec 20, 77Aug 05, 80[C22B]
4214386 Bucket wheel excavator with vibrating bucketsExpiredFeb 07, 79Jul 29, 80[E02F]
4209681 Pull switchExpiredDec 11, 78Jun 24, 80[H01H]
4202274 Removal apparatus for handling discarded end portions in a multistrand casting plantExpiredAug 15, 77May 13, 80[B61B]
4196900 SlideExpiredAug 03, 78Apr 08, 80[A63G]
4195824 Jig for tension elements for metallurgic vessels, particularly alternating convertersExpiredDec 26, 78Apr 01, 80[C21C]

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