UTDC INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
D331033 Rail vehicleExpiredSep 04, 90Nov 17, 92[]
5148753 Transit systemExpiredNov 13, 89Sep 22, 92[B61B]
5131332 Railway truck with steered axles and primary suspensionExpiredJun 19, 90Jul 21, 92[B61F]
5127599 Deceleration zone in a linear motor in-track transit systemExpiredJul 05, 90Jul 07, 92[B61L]
5118055 Reduced voltage braking system in a linear motor in-track transit systemExpiredJul 05, 90Jun 02, 92[B61L]
5116002 Stopping zones in a linear motor in-track transit systemExpiredJul 05, 90May 26, 92[B61L]
5081933 LCTS chassis configuration with articulated chassis sections between vehiclesExpiredMar 15, 90Jan 21, 92[B61D]
5053964 On-board integrated vehicle control and communication systemExpiredJul 17, 89Oct 01, 91[B61L, G06F]
D317886 Transit vehicleExpiredApr 26, 89Jul 02, 91[]
5015141 Freight transportation systemExpiredApr 30, 90May 14, 91[B65G]
4943261 Flexible shaft coupling having flexible elements interspersed between alternating attachment wedgesExpiredMay 12, 89Jul 24, 90[F16D]
4926756 Longitudinal steering linkage for truck with interaxle yokesExpiredAug 31, 89May 22, 90[B61F]
4860666 Multi-axle, steered articulated railway vehicle with compensation for transitional spiralsExpiredFeb 19, 88Aug 29, 89[B61F]
4742780 Load distribution system for railway truckExpiredJan 22, 85May 10, 88[B61F]
4729455 Wheel assembly and brake thereforExpiredAug 02, 85Mar 08, 88[B61H, B60T, F16D]
4700854 Open top draw bar arrangement having removable wedgeExpiredJul 11, 85Oct 20, 87[B61G]
4679665 Brake disc design for wheel mounted discsExpiredFeb 21, 86Jul 14, 87[F16D]
4671577 Combined regenerative and friction braking system for a vehicleExpiredNov 21, 85Jun 09, 87[H02K, B60T, F16D, B60L]
4542699 Powered radial truckExpiredOct 12, 84Sep 24, 85[B61F, B61C]
4542700 Three axle steered truckExpiredJan 14, 83Sep 24, 85[B61F]

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