ESSEX CHEMICAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4699712 Ore dressing methodExpiredFeb 25, 86Oct 13, 87[B03D]
4689142 Alkyl mercaptans as collector additives in froth flotationExpiredMar 22, 85Aug 25, 87[B03D]
4584095 Ore flotation method employing phosphorodithio compounds as frother adjuvantsExpiredJun 20, 84Apr 22, 86[B03D]
4530758 Ore flotation methodExpiredFeb 13, 84Jul 23, 85[B03D]
4507198 Flotation collectors and methodsExpiredDec 20, 82Mar 26, 85[B03D]
4396681 Process for coating one pot moisture curable coating composition onto non-porous substrate and articleExpiredJul 30, 82Aug 02, 83[B05D, B32B]
4387034 Mixed alkylthionocarbamates flotation collectors and ore dressing methods in which the collectors are employedExpiredOct 23, 81Jun 07, 83[E22B]
4367313 Coating composition and methodExpiredJun 10, 81Jan 04, 83[C08L]
4345053 Silicon-terminated polyurethane polymerExpiredJul 17, 81Aug 17, 82[C08L]
4313838 Preparation and use of xanthogen chloropropyl formate flotation reagentsExpiredApr 19, 79Feb 02, 82[C07C]
4284751 Polyurethane sealant systemExpiredMay 14, 80Aug 18, 81[C08G]
4191641 Flotation process with use of xanthogen chloropropyl formate reagentsExpiredJan 26, 78Mar 04, 80[B03D]

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