BRITISH STEEL LIMITED

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C22C ALLOYS 270
 
  
 
B23K SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 192
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
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
 
  
 
E04B GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS 146

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8430976 Rail steel with an excellent combination of wear properties and rolling contact fatigue resistanceFeb 23, 09Apr 30, 13[C22C]
5879474 Relating to carbide-free bainitic steels and method of producing such steelsSep 29, 97Mar 09, 99[C21D, C22C]
5797235 Double skin composite structuresJan 29, 97Aug 25, 98[E04B]
5773783 Double skin composite structures and methods of producing such structuresFeb 14, 97Jun 30, 98[B23K]
5741571 Double skin composite panelsNov 25, 96Apr 21, 98[B32B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5860453 Annular separators for double walled pipe structuresExpiredOct 30, 97Jan 19, 99[F16L]
5645653 RailsExpiredFeb 22, 96Jul 08, 97[E01B, C21D]
5591371 Method and device for pouring molten metalExpiredNov 10, 94Jan 07, 97[B22D]
5508865 Head guide assembly providing critial alignments and improved resonance responseExpiredMay 02, 94Apr 16, 96[G11B]
5488478 Method and apparatus for measuring the shape of a surface of an objectExpiredOct 03, 94Jan 30, 96[G01B]
5279535 Internally cooled rollerExpiredNov 06, 92Jan 18, 94[B21B]
5116027 Apparatus for controlling teeming streamsExpiredMay 03, 90May 26, 92[C21C]
5011077 RailwaysExpiredSep 18, 89Apr 30, 91[E01B]
5005632 Method and apparatus for cooling a flow of molten materialExpiredOct 10, 89Apr 09, 91[B22D]
4904312 Method of electrolytically etching linear impressions in electrical steelExpiredAug 10, 88Feb 27, 90[H01F]
4796923 Joints for tubular membersExpiredJul 21, 87Jan 10, 89[F16L]
4529441 Electrical steelsExpiredSep 07, 84Jul 16, 85[C21C]
4430117 Production of steelExpiredOct 28, 82Feb 07, 84[C21C]
4411697 Metal refining processesExpiredJun 14, 82Oct 25, 83[C21C]
4358314 Metal refining processExpiredAug 17, 81Nov 09, 82[C21C]
4328708 Rotary ultrasonic testing apparatusExpiredMay 27, 80May 11, 82[G01N]
4323717 Furnace electrode clampsExpiredJun 25, 80Apr 06, 82[H05B]
4316496 Continuous casting of metal stripExpiredJul 23, 80Feb 23, 82[B22D]
4291743 Method and apparatus for pouring molten metalExpiredMar 28, 80Sep 29, 81[B22D]

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