Assignee
KOPPERS CO INC
297 granted patents·4,475 citations·filing 1969–1986
Top patents by PatentIndex Score
297 records- 0195US4265868AProduction of carbon monoxide by the gasification of carbonaceous materialsKOPPERS CO INC·Filed 1978·Granted May 5, 1981·153 cites·29 claims
- 0295US4179043ARotary valve apparatusKOPPERS CO INC·Filed 1978·Granted Dec 18, 1979·57 cites·2 claims
- 0395US4083753AOne-spot coke quencher carKOPPERS CO INC·Filed 1976·Granted Apr 11, 1978·104 cites·11 claims
- 0495US3936295ABearing members having coated wear surfacesKOPPERS CO INC·Filed 1974·Granted Feb 3, 1976·79 cites·10 claims
- 0594US3984289ACoke quencher car apparatusKOPPERS CO INC·Filed 1975·Granted Oct 5, 1976·114 cites·13 claims
- 0694US3930961AHooded quenching wharf for coke side emission controlKOPPERS CO INC·Filed 1974·Granted Jan 6, 1976·101 cites·8 claims
- 0793US4213489AOne-spot coke quench car coke distribution systemKOPPERS CO INC·Filed 1979·Granted Jul 22, 1980·98 cites·4 claims
- 0893US3981758AProcess control system for corrugatorsKOPPERS CO INC·Filed 1974·Granted Sep 21, 1976·104 cites·54 claims
- 0992US4527488ACoke oven charging carKOPPERS CO INC·Filed 1983·Granted Jul 9, 1985·92 cites·6 claims
- 1092US4197092AHigh pressure coal gasifier feeding apparatusKOPPERS CO INC·Filed 1978·Granted Apr 8, 1980·99 cites·11 claims
- 1192US3963582AMethod and apparatus for suppressing the deposition of carbonaceous material in a coke oven batteryKOPPERS CO INC·Filed 1974·Granted Jun 15, 1976·102 cites·11 claims
- 1291US4604491ASynthetic oilsKOPPERS CO INC·Filed 1984·Granted Aug 5, 1986·90 cites·21 claims
- 1389US4366029APivoting back one-spot coke carKOPPERS CO INC·Filed 1981·Granted Dec 28, 1982·97 cites·2 claims
- 1489US3963457ACoal gasification processKOPPERS CO INC·Filed 1974·Granted Jun 15, 1976·30 cites·4 claims
- 1588US3959209ACurable solid polyester resinsKOPPERS CO INC·Filed 1973·Granted May 25, 1976·49 cites·52 claims
- 1686US4493286AMethod and apparatus for applying a multi-component adhesiveKOPPERS CO INC·Filed 1983·Granted Jan 15, 1985·70 cites·19 claims
- 1786US4475001AProcess for alkylating phenolic compounds to produce ortho- or para-monoalkylated phenols or 2,4- or 2,6-dialkylated phenolsKOPPERS CO INC·Filed 1983·Granted Oct 2, 1984·22 cites·27 claims
- 1886US4385039AProcess for removal of sulfur oxides from waste gasesKOPPERS CO INC·Filed 1982·Granted May 24, 1983·55 cites·11 claims
- 1986US4133766AFilter media support and containment systemKOPPERS CO INC·Filed 1977·Granted Jan 9, 1979·61 cites·19 claims
- 2086US3990948AApparatus for cleaning the bottom surface of a coke oven door plugKOPPERS CO INC·Filed 1975·Granted Nov 9, 1976·49 cites·9 claims
- 2186US3982408AFlexible gear coupling having a shear spacer and sleeve capturing meansKOPPERS CO INC·Filed 1975·Granted Sep 28, 1976·31 cites·4 claims
- 2285US4267279APolyester composition stabilized against gel-time drift with amine salt and method for making sameKOPPERS CO INC·Filed 1979·Granted May 12, 1981·37 cites·80 claims
- 2385US4077637ACeramic coated piston ringsKOPPERS CO INC·Filed 1977·Granted Mar 7, 1978·36 cites·4 claims
- 2485US3992455APreparation of 5-sec-alkyl-m-cresolKOPPERS CO INC·Filed 1973·Granted Nov 16, 1976·15 cites·31 claims
- 2585US3938814ABearing member having a wear resistant coating on its bearing faceKOPPERS CO INC·Filed 1974·Granted Feb 17, 1976·40 cites·11 claims
- 2683US4608408APhenol-HCHO-resorcinol resins for use in forming fast curing wood laminating adhesivesKOPPERS CO INC·Filed 1985·Granted Aug 26, 1986·43 cites·8 claims
- 2783US4336107AAligning deviceKOPPERS CO INC·Filed 1981·Granted Jun 22, 1982·44 cites·16 claims
- 2883US4267391AProcess for obtaining para-cresol and meta-cresol from a mixture of methylated and ethylated phenols characterized by urea clathration of metal-cresolKOPPERS CO INC·Filed 1979·Granted May 12, 1981·16 cites·25 claims
- 2983US4106782ACeramic coated piston ringsKOPPERS CO INC·Filed 1977·Granted Aug 15, 1978·33 cites·6 claims
- 3083US3938674AMethod and apparatus for stacking paperboard blanksKOPPERS CO INC·Filed 1974·Granted Feb 17, 1976·41 cites·6 claims
- 3182US4373010ANon-resinous, uncured tire retardant and products produced therewithKOPPERS CO INC·Filed 1980·Granted Feb 8, 1983·40 cites·34 claims
- 3282US4215229AProcess for alkylating phenolic compounds to produce ortho- and para-monoalkylated phenols and 2,4- and 2,6-dialkylated phenolsKOPPERS CO INC·Filed 1978·Granted Jul 29, 1980·15 cites·16 claims
- 3381US3953509AHydrogenation of nitrobenzene to p-aminophenolKOPPERS CO INC·Filed 1974·Granted Apr 27, 1976·12 cites·6 claims
- 3480US4323477AAcid copper chromate concentratesKOPPERS CO INC·Filed 1979·Granted Apr 6, 1982·12 cites·13 claims
- 3580US4107001AHigh pressure water cleaner for ascension pipesKOPPERS CO INC·Filed 1977·Granted Aug 15, 1978·25 cites·7 claims
- 3679US4444912APhenolic foam and composition and method for preparing the sameKOPPERS CO INC·Filed 1982·Granted Apr 24, 1984·27 cites·45 claims
- 3778US4347715AGear type coupling with overload protectionKOPPERS CO INC·Filed 1980·Granted Sep 7, 1982·21 cites·2 claims
- 3878US4267389AProcess for separating para-cresol from a mixture of methylated and ethylated phenolsKOPPERS CO INC·Filed 1979·Granted May 12, 1981·11 cites·18 claims
- 3978US4267390AProcess for obtaining para-cresol and meta-cresol from a mixture of methylated and ethylated phenols characterized by selective complexation with calcium bromide and sodium acetateKOPPERS CO INC·Filed 1979·Granted May 12, 1981·12 cites·29 claims
- 4078US4170550AProcess for reducing aqueous effluents containing environmentally unacceptable compounds from a process for gasifying carbonaceous materialsKOPPERS CO INC·Filed 1978·Granted Oct 9, 1979·23 cites·4 claims
- 4177US4445628AApparatus for sensing empty hoppersKOPPERS CO INC·Filed 1981·Granted May 1, 1984·15 cites·9 claims
- 4277US4267392AProcess for obtaining para-cresol and meta-cresol from a mixture of methylated and ethylated phenols containing meta-para-cresolKOPPERS CO INC·Filed 1979·Granted May 12, 1981·11 cites·15 claims
- 4377US3955964AProcess for making steelKOPPERS CO INC·Filed 1971·Granted May 11, 1976·23 cites·7 claims
- 4477US3952637AApparatus for changing the rotary position of a slotter member and for changing the relative position between fixed and movable knives on the slotter memberKOPPERS CO INC·Filed 1975·Granted Apr 27, 1976·36 cites·16 claims
- 4576US3933925AHydrolysis of toluene diamines to produce methyl resorcinolsKOPPERS CO INC·Filed 1975·Granted Jan 20, 1976·17 cites·7 claims
- 4675US4225391AMethod of preparing coals for cokingKOPPERS CO INC·Filed 1978·Granted Sep 30, 1980·16 cites·10 claims
- 4775US4104107AApparatus for urging web guides toward the corrugating roll of a single facerKOPPERS CO INC·Filed 1977·Granted Aug 1, 1978·27 cites·3 claims
- 4874US4191030ADiaphragm couplingKOPPERS CO INC·Filed 1978·Granted Mar 4, 1980·19 cites·3 claims
- 4974US4053068AApparatus for transferring hot coke into a coke quenching carKOPPERS CO INC·Filed 1976·Granted Oct 11, 1977·16 cites·9 claims
- 5074US4016045ACoke oven door sealing systemKOPPERS CO INC·Filed 1976·Granted Apr 5, 1977·17 cites·6 claims
Showing the top 50 of 297 patent records by PatentIndex Score.
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