VEITSCHER MAGNESITWERKE-ACTIEN-GESELLSCHAFT

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C09D COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR 191
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 122

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5332201 System of sized bricksJan 29, 93Jul 26, 94[C21B]
5286285 Finely powdery magnesium hydroxide and a process for preparing thereofJun 04, 93Feb 15, 94[C09D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5426078 Use of a finely divided, refractory, oxidic micropowder for preparing ceramic masses and moldingsExpiredJun 04, 93Jun 20, 95[C04B]
5368459 Device for preparing and feeding a monolithic ceramic mass into a metallurgical melting vesselExpiredMar 01, 93Nov 29, 94[B28B, B05B]
5344599 Process for producing sintered magnesiaExpiredMar 05, 93Sep 06, 94[C04B]
5340088 Metallurgical vessel and method of making the refractory lining of such vesselsExpiredAug 30, 93Aug 23, 94[C21C]
5333843 Device for installing and removing gas purging plugs for metallurgical vesselsExpiredApr 19, 93Aug 02, 94[B22D, C21C]
5328879 Binding and plasticizing agent for preparing carbon-containing, refractory, ceramic materials and material prepared therewithExpiredMar 08, 93Jul 12, 94[C04B]
5133534 Device for removing worn nozzle bricks or nozzle linings from metallurgical vesselsExpiredApr 02, 91Jul 28, 92[C21C]
5106608 Magnesium oxide in fine powder form and its useExpiredApr 05, 90Apr 21, 92[C01F]
5104696 Process and device for intermittenly spraying a pasty compositionExpiredApr 19, 90Apr 14, 92[B05C, B05D, B05B]
5067693 Electric arc oven for treating molten metals with a gas and a process thereforExpiredMar 13, 90Nov 26, 91[C21B]
5007366 Refractory gas permeable bubbling plugExpiredNov 28, 89Apr 16, 91[G01D, C21C, C21B]
4944928 Process for producing pure magnesium oxideExpiredFeb 27, 89Jul 31, 90[C01F]
4766098 Method of protecting a coal gasifier part from attack by liquid slagsExpiredFeb 19, 87Aug 23, 88[C04B]
4651810 Checkerwork for upright regeneration chambers of a glass melting furnaceExpiredJun 16, 86Mar 24, 87[F28D]
4589474 Checkerwork in horizontal chamber of a regeneratively fired furnaceExpiredOct 11, 83May 20, 86[F28D]
4540039 Prismatic refractory brick for glass melting furnace chambersExpiredMay 02, 83Sep 10, 85[F28D]
4436144 Prismatic brick of refractory materialExpiredFeb 05, 82Mar 13, 84[F28D]
4427184 Taphole apparatusExpiredJan 25, 82Jan 24, 84[C21C]
4422626 Apparatus for repairing a refractory furnace liningExpiredNov 01, 82Dec 27, 83[F27D]
4362709 Process of preparing sinter magnesiaExpiredNov 02, 81Dec 07, 82[C01F]

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