HARBISON-WALKER REFRACTORIES COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C04B LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS 365
 
  
 
F27B FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS321
 
  
 
1509 MACHINE TOOLS, ABRADING AND FOUNDING MACHINERY227
 
  
 
B05D PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 186
 
  
 
2501 BUILDING MATERIALS134

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE45360 Rotary kiln heat exchanger and method of assembling sameMay 16, 08Feb 03, 15[F27B]
8658552 Chromia-containing refractoryDec 23, 09Feb 25, 14[C04B]
RE44612 Rotary kiln heat exchanger and method of assembling sameApr 25, 05Nov 26, 13[F27B]
7754633 Chromia-alumina refractoryJul 22, 08Jul 13, 10[C04B]
D598572 Refractory brickJul 02, 08Aug 18, 09[2501]
D591778 Refractory blockAug 30, 07May 05, 09[1509]
D567829 Refractory blockApr 29, 05Apr 29, 08[1509]
6688884 Rotary kiln heat exchanger and method of assembling sameJun 06, 02Feb 10, 04[F27B]
6268018 Method of applying a non-slumping pumpable castable high purity silica compositionFeb 09, 99Jul 31, 01[B05D]
5770536 Fiber reinforced spray mixAug 06, 96Jun 23, 98[C04B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2007/0213,198 Refractory compositionAbandonedMar 08, 06Sep 13, 07[C04B]
2007/0213,199 REFRACTORY COMPOSITIONAbandonedSep 15, 06Sep 13, 07[C04B]
2006/0242,914 Refractory block and refractory wall assemblyAbandonedJul 15, 05Nov 02, 06[E04F, E04H]
7104789 Wall structure for carbon baking furnaceExpiredMar 17, 05Sep 12, 06[F27B]
6395662 Non-slumping sprayable refractory castables containing thermal blackExpiredAug 29, 01May 28, 02[C04B]
6313055 Refractory castables containing thermal blackExpiredAug 20, 98Nov 06, 01[C04B]
6313056 Non-slumping sprayable refractory castables containing thermal blackExpiredAug 20, 98Nov 06, 01[C04B]
6190448 Non-slumping, pumpable castable high purity silica compositionExpiredFeb 09, 99Feb 20, 01[C04B, C09D]
5882583 precast module leveling assembly for a metallurgical vesselExpiredJun 11, 97Mar 16, 99[C21B]
5879616 Metallurgical vessel and method of using the sameExpiredJun 11, 97Mar 09, 99[C21B]
5775439 Method of cooling an impulse toolExpiredJan 24, 97Jul 07, 98[B25B]
5761859 Interconnected door jamb brickExpiredJun 04, 96Jun 09, 98[F23M, E06B]
5753572 Castable and gunning composition with improved resistance to build-up and alkali infiltrationExpiredJun 28, 96May 19, 98[C04B]
5750878 Removable reference plateExpiredFeb 05, 96May 12, 98[G01N]
5518189 Beneficiation of flake graphiteExpiredApr 06, 95May 21, 96[B02C]
4999325 Rebonded fused brickExpiredOct 28, 88Mar 12, 91[C04B]
4544643 Refractory fused chrome-alumina bricks and compositions made from a granular fused material and processes for their productionExpiredJun 11, 84Oct 01, 85[C04B]
4521357 Carbon bonded refractoriesExpiredMay 02, 83Jun 04, 85[C04B]

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