STELCO INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C25F PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR 216
 
  
 
B21C MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL120
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 122
 
  
 
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

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6528010 Molten metal handling vesselFeb 07, 01Mar 04, 03[C21B]
6074765 Grinding rod chemistry and method of heat treatment to enhance wearabilityJun 03, 98Jun 13, 00[C21D]
5310131 Thin material handling system for use in downcoilers and methodJun 29, 92May 10, 94[B21C]
5227033 Electrolytic etching of metals to reveal internal qualityJun 11, 92Jul 13, 93[C25F]
5186796 Method and apparatus for electrolytic etching of metalsAug 14, 91Feb 16, 93[C25F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6003879 Seal for steel furnace emissionsExpiredFeb 19, 98Dec 21, 99[F16J]
5968320 Non-recovery coke oven gas combustion systemExpiredFeb 07, 97Oct 19, 99[C10J, C10B]
5249622 Retrofitted width adjusting mechanism for continuous castingExpiredApr 13, 92Oct 05, 93[B22D]
5061352 Electrolytic etching of metals to reveal internal qualityExpiredMay 04, 90Oct 29, 91[C25F]
5040440 Product switching mechanismExpiredMay 09, 90Aug 20, 91[B23D]
5014534 Frame-mounted entry guide systemExpiredMay 30, 90May 14, 91[B21B]
4982936 Continuous annealing linesExpiredDec 13, 89Jan 08, 91[C21C]
4951694 Wire pickling apparatusExpiredFeb 02, 90Aug 28, 90[C23G]
4915732 Desulfurizing ironExpiredMay 09, 89Apr 10, 90[C21C]
4834346 Ladle lid arrangementExpiredFeb 09, 88May 30, 89[C21C]
4810016 Lifting hookExpiredOct 16, 84Mar 07, 89[B66C]
4612042 Method for automatically fluxing and casting samplesExpiredJul 15, 85Sep 16, 86[C22B]
4563146 Apparatus for automatically fluxing and casting samplesExpiredApr 18, 84Jan 07, 86[B22D]
4549269 Methods and apparatus for making prevailing torque nutsExpiredDec 05, 83Oct 22, 85[G06F, B21D]
4533642 Metal analysis for acid-soluble elementsExpiredApr 26, 82Aug 06, 85[G01N]
4509220 Prevailing torque nutExpiredDec 06, 82Apr 09, 85[B21D]
4498505 Apparatus for separating a coil from following coils of coiled wire rodExpiredJun 21, 83Feb 12, 85[B26D]
4439991 Method and apparatus for treating elongate materialsExpiredJun 11, 82Apr 03, 84[F25B, F25D]
4423857 Spacer for batch coil annealingExpiredJul 06, 82Jan 03, 84[F27D]
4306438 Metal strip downcoilers-IIExpiredMar 17, 80Dec 22, 81[B21B]

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