RHONE-POULENC SURFACTANTS AND SPECIALTIES INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5068277 Hydrolyzable silicone polymersExpiredMay 03, 89Nov 26, 91[C08K]
5045232 Low viscosity defoaming/antiforming formulationsExpiredJul 12, 89Sep 03, 91[B01D]
5045586 Lubricants for thermoplastic resinsExpiredMay 01, 89Sep 03, 91[C08F, C08K]
4994577 Quaternized siliconesExpiredSep 05, 89Feb 19, 91[C07F]
4943664 Surfactant products containing 1,3,4-butanetriolExpiredSep 22, 89Jul 24, 90[C07C]
4937277 Alkoxylated silicon polymersExpiredMay 16, 88Jun 26, 90[C08K]
4924006 N-pyrrolidonyl alkyl amino 1,3,4-butanetriol compoundsExpiredOct 02, 89May 08, 90[C07D]
4900520 Process for removal of soluble platinum group metal catalysts from liquid product mixturesExpiredOct 31, 88Feb 13, 90[C22B, C01G]
4886609 Method for stimulation of oil and gas wellsExpiredOct 09, 87Dec 12, 89[E21B]
4873003 Cationic soil release polymersExpiredOct 26, 88Oct 10, 89[C11D]
4873294 Mixture of cationic benzene carboxylate polymers from the reaction of haloacetyl terminated poly(ether-esters) with terminal quaternizing agentsExpiredJun 16, 88Oct 10, 89[C08G]
4871483 Novel non-depositing defoaming compositionsExpiredApr 16, 87Oct 03, 89[C09F]
4867750 Alkoxylated polyestersExpiredDec 12, 88Sep 19, 89[C09K, C07C]
4830769 Propoxylated guerbet alcohols and esters thereofExpiredFeb 01, 88May 16, 89[C10M, C07C]
4824606 Alkoxylated polyestersExpiredApr 20, 88Apr 25, 89[C09K, C07C]
4813482 Method for removal of paraffin from producing oil wellsExpiredSep 17, 87Mar 21, 89[E21B]
4806609 Pyrrolidonyl acrylate block polymersExpiredApr 18, 88Feb 21, 89[C08L]
4804483 Cationic soil release polymersExpiredJan 13, 88Feb 14, 89[D06M]
4800077 Guerbet quaternary compoundsExpiredJan 13, 88Jan 24, 89[A61K]
4787989 Anionic soil release compositionsExpiredJan 13, 88Nov 29, 88[D06M, C11D]

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