UNIFRAX CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5767022 Friction pad containing high temperature stable continuous filament glass fibersExpiredDec 17, 96Jun 16, 98[C08J, F16D, B32B]
4863700 Monolithic catalytic converter mounting arrangementExpiredMay 09, 88Sep 05, 89[B01J]
4850171 Modular furnace lining and hardware system thereforExpiredNov 07, 88Jul 25, 89[F23M, E04B]
4822679 Spray-applied ceramic fiber insulationExpiredJan 13, 87Apr 18, 89[D02G, B32B]
4803822 Modular furnace lining and hardware system thereforExpiredJan 30, 87Feb 14, 89[F23M, E04B]
4640848 Spray-applied ceramic fiber insulationExpiredAug 26, 85Feb 03, 87[B05D]
4612087 Method of producing seamless ceramic fiber composite articlesExpiredSep 02, 83Sep 16, 86[E04B, B32B]
4523531 Modular furnace lining having mechanically interlocking attachment meansExpiredFeb 22, 84Jun 18, 85[F23M]
4442219 Two part castable ceramic cementExpiredOct 19, 81Apr 10, 84[C04B]
4435468 Seamless ceramic fiber composite articles and method and apparatus for their productionExpiredFeb 12, 82Mar 06, 84[E04B, B32B]
4418415 Ceramic fiber insulated furnaces with electrical hanger element of great mechanical integrityExpiredMar 08, 82Nov 29, 83[H05B]
4363199 Fire resistant sealing system for holes in fire resistant building partitionsExpiredMay 05, 80Dec 14, 82[E04B]
4349637 Alumina binder for fiber containing aluminaExpiredApr 21, 80Sep 14, 82[C04B]
4332852 Conditioned colloidal silica post impregnant to prevent binder migration in the production of insulation articles comprising randomly oriented refractory fibersExpiredDec 03, 79Jun 01, 82[D21F]
4312911 Chromium oxide coated refractory fibersExpiredDec 19, 79Jan 26, 82[D02G]
4277269 Process for the manufacture of ceramic oxide fibers from solvent solutionExpiredDec 19, 79Jul 07, 81[C03B]
4248752 Refractory moldable compositionExpiredJun 28, 79Feb 03, 81[C04B, C08L]
4240833 Shrink-resistant refractory fiber and process for making sameExpiredDec 12, 79Dec 23, 80[C03C, C04B]
4238547 High strength yarn consisting of boron carbide fibersExpiredDec 01, 78Dec 09, 80[D02G]
4204907 Conditioned colloidal silica post impregnant to prevent binder migrationExpiredMar 29, 78May 27, 80[D21F]

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