KERR-MCGEE COAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5125230 Soot removal from exhaust gasExpiredJan 16, 91Jun 30, 92[F01N]
5003774 Apparatus for soot removal from exhaust gasExpiredOct 27, 89Apr 02, 91[F01N]
4908047 Soot removal from exhaust gasExpiredOct 09, 87Mar 13, 90[B03C]
4904154 Loading system for railroad carsExpiredNov 03, 88Feb 27, 90[B65G]
4746498 Process for reducing gaseous sulfur dioxide content of flue gases by preheating coals prior to burning such coals and by controlling combustion temperature levelsExpiredAug 27, 84May 24, 88[C01B, F23J, B01J, F23B]
4702899 Process for treating coal to reduce sulfur content in flue gases produced by coal combustionExpiredJul 25, 86Oct 27, 87[C01B, B01J]
4645654 Reducing sulfur content in flue gases produced by coal combustionExpiredSep 28, 82Feb 24, 87[C01B, B01J]
4629392 System for batch loading coal into railroad carsExpiredJul 16, 84Dec 16, 86[B65G]
4605421 Process for the preparation of a carbonaceous-derived solid fuel productExpiredSep 10, 84Aug 12, 86[C10L]
4460308 Method for loading coal into railroad carsExpiredFeb 08, 82Jul 17, 84[B65G]
4417840 Particulate material transfer systemExpiredApr 02, 81Nov 29, 83[B65G]
4396339 Particulate material transfer systemExpiredApr 02, 81Aug 02, 83[B65G]
4299295 Process for degasification of subterranean mineral depositsExpiredFeb 08, 80Nov 10, 81[E21B]
4290725 Particulate material transfer systemExpiredOct 04, 79Sep 22, 81[B65G]
4277215 Articulate material transfer systemExpiredOct 04, 79Jul 07, 81[B65G, B61D]
4273193 Process for use in degasification of subterranean mineral depositsExpiredFeb 08, 80Jun 16, 81[E21B]

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