SIGNAL CAPITAL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4696088 Method of converting a hopper type of rail car to accept a wider output gateExpiredOct 17, 86Sep 29, 87[B21K]
4498993 Process for the treatment of clay slimesExpiredJul 16, 84Feb 12, 85[C02F]
4478736 Composition and process for the treatment of clay slimesExpiredJan 14, 83Oct 23, 84[C02F]
4198869 Apparatus for permanently indicating maximum gas pressure in a systemExpiredFeb 21, 79Apr 22, 80[G01L]

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