T&N Materials Research Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4898701 Manufacture of shaped articles from refractory powderExpiredDec 30, 87Feb 06, 90[C08B]
4792491 GasketsExpiredNov 26, 86Dec 20, 88[B05D]
4591166 Gasket and process of making gaskets from exfoliated graphiteExpiredSep 29, 83May 27, 86[C01B, F02F, F16J, B32B]
4548678 Flexible sheet material and articles made therefromExpiredMay 12, 83Oct 22, 85[D21F]
4534922 GasketsExpiredSep 29, 83Aug 13, 85[D04H]
4530949 Housing for electrical or electronic equipmentExpiredJul 19, 84Jul 23, 85[C08K]
4529653 Flexible, asbestos-free gasket materialExpiredNov 07, 83Jul 16, 85[B65D, B32B]
4529662 Asbestos-free sheet material for spiral-wound gasketsExpiredNov 10, 83Jul 16, 85[B65D, B32B]
4529663 Flexible, asbestos-free gasket materialExpiredApr 19, 84Jul 16, 85[B65D, B32B]
4454238 Manufacture of continuous glass filaments and compositions thereforExpiredDec 06, 82Jun 12, 84[C03B]
4435235 Gasket manufactureExpiredDec 22, 81Mar 06, 84[B29C, F02F, B32B, D04H]
4363847 Flexible sheet materialExpiredJul 01, 81Dec 14, 82[D04D, B32B]
4337863 Process for the concentration of fibrous materialExpiredJan 30, 81Jul 06, 82[B03B]
4248664 Fibrous sheet materialsExpiredJun 13, 79Feb 03, 81[D21H]

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