LTV Steel Company, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 183

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE35967 Process of making electrical steelsJul 21, 97Nov 24, 98[H01F]
RE30926 Ultrasonic inspectionFeb 05, 81May 11, 82[G01N]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6518533 High strength steel tubingExpiredNov 01, 01Feb 11, 03[B23K, B21D]
6221501 Steel with electrically insulating hematite layerExpiredAug 17, 99Apr 24, 01[H01F, B32B]
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]
5885323 Foamy slag process using multi-circuit lanceExpiredApr 25, 97Mar 23, 99[C21C]
5723055 Nozzle assembly having inert gas distributorExpiredJul 09, 96Mar 03, 98[B22D]
5067552 Shrouding for top pouring of ingotsExpiredJul 26, 89Nov 26, 91[B22D]
4785243 Electronically scanned eddy current flaw inspectionExpiredJan 29, 87Nov 15, 88[G01N]
4751839 Method for removing certain of the corrugations in a helically corrugated pipeExpiredJan 28, 87Jun 21, 88[B21D]
4705260 Furnace for heating and melting zincExpiredJun 06, 84Nov 10, 87[F27D]
4683430 Eddy current flaw detector method and apparatus having a rotatable high permeability flux concentrator encircling a workpieceExpiredJun 27, 84Jul 28, 87[G01N, G01R]
4673879 Eddy current flaw detector having rotatable field defining sleeve for selectively enhancing induced eddy currents in a workpieceExpiredJun 27, 84Jun 16, 87[G01N, G01R]
4644271 Method and apparatus for examining a workpieceExpiredFeb 25, 85Feb 17, 87[G01N]
4644272 Hot annealed weld inspectionExpiredJul 31, 84Feb 17, 87[G01N]
4629367 Retaining wallExpiredJul 12, 84Dec 16, 86[E02D]
4589465 Top pour shroudExpiredDec 14, 83May 20, 86[B22D]
4583389 Method for removing certain of the corrugations in a helically corrugated pipeExpiredMay 09, 80Apr 22, 86[B21D]
4576570 Automatic combustion control apparatus and methodExpiredJun 08, 84Mar 18, 86[F23N]
4543528 Flexible probe assembly for use in nondestructive testing of a convex workpiece surfaceExpiredMar 18, 83Sep 24, 85[G01N, G01R]

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