General American Transportation Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5168717 CO.sub.2 cooled railcarExpiredNov 13, 91Dec 08, 92[B60H]
4711274 External purge system for a tank trainExpiredMar 26, 87Dec 08, 87[B65B]
4664038 Door latch control apparatus for hopper vehicleExpiredJul 11, 83May 12, 87[B61D]
4664307 Spirally welded tank carsExpiredSep 20, 85May 12, 87[B23K, B61D]
4586547 Ball valve purge device for tank carsExpiredMay 18, 84May 06, 86[B65B]
4557199 Lifting structure for railway tank carExpiredJul 25, 83Dec 10, 85[B61K, B61D]
4515189 Molten sulfur tank car assemblyExpiredJul 11, 83May 07, 85[B65B]
4513795 Tank with selectively variable automatic outageExpiredMay 20, 83Apr 30, 85[B60P]
4493266 Railway hopper car and center sill construction thereforExpiredJun 01, 82Jan 15, 85[B61F, B61D]
4440528 Container for pulverulent materialExpiredAug 27, 82Apr 03, 84[B65G]
4414462 Tank car heating systemExpiredJul 17, 81Nov 08, 83[H05B, F28D, B61D, B60L]
4304271 Tank car and train thereof and loading and unloading systemsExpiredFeb 21, 80Dec 08, 81[F17D, B65B]
4245749 Safety deviceExpiredJan 10, 79Jan 20, 81[F16K, B65D]

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