Midrex International B.V. Zurich Branch

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 1310
 
  
 
F27D DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE 124
 
  
 
G21B FUSION REACTORS 19

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7806959 Metallic iron nuggetsJun 04, 07Oct 05, 10[C21B]
7674316 Method for producing metallic ironJul 31, 08Mar 09, 10[C21B]
6749664 Furnace hearth for improved molten iron production and method of operationJan 24, 02Jun 15, 04[C21B]
6630010 Method of producing metallic ironMar 28, 01Oct 07, 03[C21B]
6602317 Method and apparatus for controlling temperature uniformity of the burden in a direct reduction shaft furnaceAug 30, 01Aug 05, 03[C21B]
6592649 Method of producing iron nuggetsJun 28, 01Jul 15, 03[C21B]
6413295 Iron production method of operation in a rotary hearth furnace and improved furnace apparatusMar 12, 99Jul 02, 02[C21B]
6352573 Method for the separation and recycling of hot fines in hot briquetting of reduced ironMar 21, 01Mar 05, 02[C21B]
6214086 Direct reduced iron discharge system and methodOct 08, 99Apr 10, 01[G21B]
6200363 Direct reduced iron hot/cold discharge systemOct 08, 99Mar 13, 01[C21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2006/0248,981 Granular metallic ironAbandonedJul 06, 06Nov 09, 06[C22C]
2006/0070,495 Granular metallic ironAbandonedDec 08, 05Apr 06, 06[C21B]
2004/0173,054 Method of manufacturing metal ironAbandonedJan 09, 04Sep 09, 04[C21B]
2004/0076,539 Granular metallic ironAbandonedJan 14, 03Apr 22, 04[C22C]
6602320 Method for producing reduced ironExpiredApr 10, 01Aug 05, 03[C21B]
6569223 Method of manufacturing molten metal ironExpiredMar 29, 01May 27, 03[C21B]
6503289 Process for manufacturing molten metal ironExpiredMar 30, 01Jan 07, 03[C21B]
4900356 Process and apparatus for producing metallized pellets and scrubbing spent reducing gasExpiredMar 01, 88Feb 13, 90[F27B, C21B]
4752329 Apparatus and method for increasing carbon content of hot directly reduced ironExpiredMar 21, 86Jun 21, 88[F27B, C21B]
4731112 Method of producing ferro-alloysExpiredJun 17, 86Mar 15, 88[C22B]
4728358 Iron bearing briquet and method of makingExpiredApr 30, 86Mar 01, 88[C22B]
4702766 Method of increasing carbon content of direct reduced iron and apparatusExpiredMar 21, 86Oct 27, 87[F27B, C21B]
4701214 Method of producing iron using rotary hearth and apparatusExpiredApr 30, 86Oct 20, 87[F27B, C21B]
4691868 Screen sizerExpiredFeb 18, 86Sep 08, 87[B02L]
4685964 Method and apparatus for producing molten iron using coalExpiredOct 03, 85Aug 11, 87[C21B]
4591380 Method of generating a reducing gasExpiredSep 04, 85May 27, 86[C21B]
4553742 Apparatus for generating a reducing gasExpiredOct 09, 84Nov 19, 85[F27B]
4536213 Reforming of higher hydrocarbons for metal oxide reductionExpiredSep 10, 84Aug 20, 85[C21B]
4470581 Apparatus for selective reduction of metallic oxidesExpiredJan 20, 83Sep 11, 84[F27B]
4462526 Continuous briquet sheet separatorExpiredJun 14, 82Jul 31, 84[B26D, B02C, B26F, B23D]

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