BETHLEHEM STEEL CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B22D CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 148
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
C21C PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL 117
 
  
 
C22B PRODUCTION OR REFINING OF METALS 127
 
  
 
C22C ALLOYS 171

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5603746 Method and apparatus to determine and control the carbon content of steel in a BOF vesselOct 31, 95Feb 18, 97[C21C]
5169591 Impact pad for a continuous caster tundishFeb 07, 92Dec 08, 92[B22D]
RE31213 Polyolefin composition having high impact resistance and high temperature flow resistanceJan 28, 81Apr 19, 83[B32B]
RE30795 Green balls formed by agglomerating wet-collected fume produced in metallurgical furnacesAug 23, 79Nov 17, 81[C22C]
RE30488 Method for preparing dry collected fume for use in metallurgical furnacesMay 05, 78Jan 20, 81[C22B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5682823 Removable insulated cover and method for transporting hot oversized steel ingotsExpiredAug 23, 96Nov 04, 97[B61D]
5401004 Method and apparatus for installing a nozzle insert in a steelmaking ladleExpiredMay 03, 94Mar 28, 95[B22D]
5337470 Method and apparatus for removing a nozzle insert from a steelmaking ladleExpiredApr 26, 93Aug 16, 94[B23P]
5335896 Nozzle insert for a steelmaking ladleExpiredMar 03, 93Aug 09, 94[B22D]
5298053 Consumable lance for oxygen injection and desulfurization and methodExpiredAug 12, 93Mar 29, 94[C21C]
5239357 Apparatus for measuring variations in windings of coiled materialExpiredSep 06, 91Aug 24, 93[G01N, G01B]
5170653 Method for coiling twist free steel barsExpiredSep 07, 90Dec 15, 92[B65H, B21C, B21B]
5143683 Protective shield having heat conductive propertiesExpiredJun 18, 91Sep 01, 92[C21C]
5131633 Apparatus for retrieving a slag sample during a steelmaking operationExpiredOct 28, 91Jul 21, 92[C21B]
5117546 Apparatus and method for replacing a bull gear on a trunnionExpiredJun 17, 91Jun 02, 92[B23P]
5071107 Metallurgical tundish with filterExpiredNov 21, 90Dec 10, 91[B22D]
5064118 Method and apparatus for controlling the thickness of a hot-dip coatingExpiredDec 26, 90Nov 12, 91[B05B]
5043230 Zinc-maganese alloy coated steel sheetExpiredMay 11, 90Aug 27, 91[B32B]
5031688 Method and apparatus for controlling the thickness of metal strip cast in a twin roll continuous casting machineExpiredDec 11, 89Jul 16, 91[B22D]
5024380 Method and apparatus for continuous welded railExpiredJan 05, 90Jun 18, 91[E01B]
5017335 Microalloyed steel and process for preparing a railroad joint barExpiredJun 29, 89May 21, 91[C21D, C22C]
5014393 Vibrating mold assemblyExpiredJun 14, 89May 14, 91[B22D]
5004131 Molten metal slide gate valveExpiredApr 16, 90Apr 02, 91[B22D]
4988843 Electrical flash butt welding apparatusExpiredJan 04, 90Jan 29, 91[B23K]
4979555 Roll change assembly for a continuous casterExpiredMay 12, 89Dec 25, 90[B22D, B21B]

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