INTERNATIONAL STEEL GROUP INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 282
 
  
 
B22D CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 148
 
  
 
C21C PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL 117
 
  
 
C21D MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS 144
 
  
 
C23C COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 1100
 
  
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 1110

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6488790 Method of making a high-strength low-alloy hot rolled steelJan 22, 01Dec 03, 02[C21D]
6231686 Formability of metal having a zinc layerSep 15, 98May 15, 01[C23C]
5865876 Multipurpose lanceDec 13, 96Feb 02, 99[C21C]
RE35967 Process of making electrical steelsJul 21, 97Nov 24, 98[H01F]
5609696 Process of making electrical steelsJul 14, 95Mar 11, 97[H01F]
5539768 Electric arc furnace electrode consumption analyzerMar 21, 95Jul 23, 96[H05B]
5137075 Continuous casting apparatus and methodFeb 21, 91Aug 11, 92[B22D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6569265 Electrical steel with improved magnetic properties in the rolling directionExpiredSep 01, 00May 27, 03[H01F]
6284388 Steel with electrically insulating hematite layerExpiredAug 23, 00Sep 04, 01[H01F, B32B]
6250521 Preventing air aspiration in slide gate plate throttling mechanismsExpiredFeb 02, 00Jun 26, 01[B22D]
6231685 Electrical steel with improved magnetic properties in the rolling directionExpiredJun 19, 98May 15, 01[H01F]
6221501 Steel with electrically insulating hematite layerExpiredAug 17, 99Apr 24, 01[H01F, B32B]
6217673 Process of making electrical steelsExpiredSep 29, 97Apr 17, 01[H01F]
6158572 Water driven roller for hot strip mill sideguidesExpiredJul 31, 98Dec 12, 00[B65G]
6120577 Treatment of steel mill waste metal oxidesExpiredMar 25, 98Sep 19, 00[C22B, C21B]
6068708 Process of making electrical steels having good cleanliness and magnetic propertiesExpiredMar 10, 98May 30, 00[C21D]
6016941 Submerged entry nozzleExpiredApr 14, 98Jan 25, 00[B22D]
5897684 Basic oxygen process with iron oxide pellet additionExpiredApr 17, 97Apr 27, 99[C21C]
5885323 Foamy slag process using multi-circuit lanceExpiredApr 25, 97Mar 23, 99[C21C]
5885328 Method of agglomerating oil-containing steel mill wasteExpiredMay 31, 96Mar 23, 99[C22B]
5830259 Preventing skull accumulation on a steelmaking lanceExpiredJun 25, 96Nov 03, 98[C21B]
5798001 Electrical steel with improved magnetic properties in the rolling directionExpiredDec 28, 95Aug 25, 98[H01F]
5584909 Controlled foamy slag processExpiredJan 19, 95Dec 17, 96[C21C]
5472479 Method of making ultra-low carbon and sulfur steelExpiredJan 26, 94Dec 05, 95[C21C]
5417739 Method of making high nitrogen content steelExpiredDec 30, 93May 23, 95[C21C]
5203909 Method and apparatus for slag free castingExpiredOct 15, 91Apr 20, 93[B22D]

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