KOPPERS DELAWARE, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E01B PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS 178
 
  
 
C10C WORKING-UP TAR, PITCH, ASPHALT, BITUMEN; PYROLIGNEOUS ACID 47
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 254
 
  
 
0808 FASTENING, SUPPORTING OR MOUNTING DEVICES NOT INCLUDED IN OTHER CLASSES218
 
  
 
C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS 1115

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9328464 Single bend railSep 12, 13May 03, 16[E01B]
9103074 Modular insulated tie plateDec 21, 12Aug 11, 15[B23P, E01B]
8777121 Lap jointJan 16, 12Jul 15, 14[E01B]
8302878 Method and arrangement to insulate rail endsMar 01, 11Nov 06, 12[E01B]
8123144 Rail joint bars and rail joint assembliesJan 14, 09Feb 28, 12[E01B]
8113441 Lap jointSep 12, 07Feb 14, 12[E01B]
7975933 Method and arrangement to insulate rail endsMar 14, 06Jul 12, 11[E01B]
7490781 Rail joint bars and rail joint assembliesAug 14, 06Feb 17, 09[E01B]
D576023 Center supported bond jointJan 13, 05Sep 02, 08[0808]
D547642 Wrap-around joint bar sleeve insulatorAug 15, 05Jul 31, 07[0808]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0223,151 Center Supported Bond JointAbandonedMay 16, 12Sep 06, 12[E01B]
8042747 Notched tie plate insulatorExpiredAug 28, 08Oct 25, 11[E01B]
2009/0302,125 Center Supported Bond JointAbandonedJun 05, 09Dec 10, 09[E01B]
7465387 Coal tar and hydrocarbon mixture pitch and the preparation and use thereofExpiredMar 22, 06Dec 16, 08[C10C]
7261244 Tie plateExpiredNov 07, 05Aug 28, 07[E01B]
2005/0263,436 Coal tar and hydrocarbon mixture pitch production using a high efficiency evaporative distillation processAbandonedMay 10, 05Dec 01, 05[C10C]
2005/0081,752 Chopped carbon fiber preform processing method using coal tar pitch binderAbandonedJun 01, 04Apr 21, 05[C08J, C10C, C08L]
6543118 Cross-tie pre-plating systemExpiredOct 12, 00Apr 08, 03[B21D]
5405524 Process for the catalytic conversion of low molecular weight aromatic hydrocarbonsExpiredOct 29, 93Apr 11, 95[C10C]

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