Firma Carl Still GmbH & Co. KG

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4832795 Coke dry cooling chamberExpiredDec 31, 87May 23, 89[C10B]
4793834 Process for cooling crude coke oven gasExpiredApr 29, 87Dec 27, 88[B01D]
4792382 Process for removing dust from dry cooled cokeExpiredDec 01, 86Dec 20, 88[C10B]
4726465 Coke quenching carExpiredJun 13, 86Feb 23, 88[C10B]
4713148 Light construction plug for coke oven doorsExpiredNov 12, 85Dec 15, 87[C10B]
4701243 Method for cooling and dedusting dry cooled cokeExpiredFeb 21, 86Oct 20, 87[C10B]
4699693 Apparatus for dry cooling red-hot cokeExpiredAug 12, 85Oct 13, 87[C10B]
4692217 Readjustment device for coke oven batteriesExpiredJul 29, 85Sep 08, 87[C10B]
4690160 Hydraulically operated high-pressure piston pumpExpiredJan 28, 85Sep 01, 87[B08B]
4668343 Method for dry cooling red-hot cokeExpiredSep 10, 84May 26, 87[C10B]
4668344 Method for cooling coke and generating superheated high pressure steamExpiredOct 11, 85May 26, 87[C10B]
4662895 Method of cooling and gasifying retort coalExpiredMay 09, 85May 05, 87[C10J, C10B]
4663134 Method and device for fine desulfurization of coke oven gasExpiredMay 06, 85May 05, 87[C01B]
4647341 Dry coke cooling plantExpiredDec 20, 84Mar 03, 87[C10B]
4632676 Method and device for stripping ammoniacal water countercurrently with steamExpiredDec 14, 82Dec 30, 86[B01D]
4620828 Device for tilting and turning coke-oven doors for maintenance purposesExpiredDec 05, 83Nov 04, 86[B66F]
4620967 Method of recovering sulfur in a Claus process from vapors obtained in coke oven gas cleaningExpiredMay 09, 85Nov 04, 86[C01B, B01D]
4614567 Method and apparatus for selective after-quenching of coke on a coke benchExpiredJun 12, 85Sep 30, 86[G01J, C10B]
4601728 Method and apparatus for preparing a material for hot briquettingExpiredApr 30, 85Jul 22, 86[C10L, B30B]
4588479 Device for cooling incandescent cokeExpiredMar 11, 85May 13, 86[C10B]

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