CHEMTECH ROYALTY ASSOCIATES, L.P.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5190814 Non-dusting window envelope film utilizing a particulate anti-flecking agentExpiredOct 15, 90Mar 02, 93[B24C, B32B]
5183797 Catalyst for hydrohalogenation of hydrocarbonsExpiredNov 07, 91Feb 02, 93[B01J]
5115086 Primer composition for improving the bonding of a urethane adhesiveExpiredFeb 06, 90May 19, 92[C08G, C09D]
5109138 Process and catalyst for hydrohalogenation of hydrocarbonsExpiredMay 14, 91Apr 28, 92[C07C]
5091461 Filled polymeric blendExpiredApr 07, 89Feb 25, 92[C08J, C08L, C08K]
5041479 Dispersing ignition resistant additives into carbonate polymersExpiredAug 24, 89Aug 20, 91[C08K]
5037941 Interfacial preparation of polycarbonate prepolymer with motionless mixerExpiredApr 06, 90Aug 06, 91[C08G]
5031546 Hopper car discharge systemExpiredFeb 28, 89Jul 16, 91[B61D]
5015511 Linear low density ethylene interpolymers for injection moldingExpiredMay 12, 88May 14, 91[B29D]
5009953 Non-dusting window envelope film utilizing a particulate anti-flecking agentExpiredOct 17, 89Apr 23, 91[B29C, B32B]
5006369 Removing contaminants from a gas streamExpiredAug 05, 88Apr 09, 91[B05D]
4988781 Process for producing homogeneous modified copolymers of ethylene/alpha-olefin carboxylic acids or estersExpiredFeb 27, 89Jan 29, 91[C08F]
4935173 Process for producing prillsExpiredDec 23, 88Jun 19, 90[B29B]
4929663 Fire retardant impact modified carbonate polymer compositionExpiredMar 20, 89May 29, 90[C08K]
4927621 Purification of anhydrous hydrogen chlorideExpiredJan 27, 89May 22, 90[C01B, B01D]
4909975 Fine denier fibers of olefin polymersExpiredFeb 01, 89Mar 20, 90[D01D]
4904710 Gamma radiation resistant carbonate polymer compositionsExpiredOct 31, 85Feb 27, 90[C08K]
4894486 Stabilizer for bisphenols and process of using sameExpiredDec 22, 88Jan 16, 90[C07C]
4883846 Anionic polymerization of purified monovinylidene aromatic monomer feed stockExpiredApr 20, 87Nov 28, 89[C08F]
4880691 Fine denier fibers of olefin polymersExpiredJun 10, 87Nov 14, 89[D03D, C08F, D04H]

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