Southern Railway Company

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4805854 Gate circuitry for hot box detectorsExpiredFeb 25, 87Feb 21, 89[B61L]
4784547 Cargo restraining device for a vehicleExpiredApr 13, 87Nov 15, 88[B60P]
4760797 Method and apparatus for automated tie detection and tampingExpiredFeb 20, 85Aug 02, 88[B61L, E01B]
4673854 Electronic cross-level detection systemExpiredAug 01, 84Jun 16, 87[E01B, B64C]
4665649 Gate operator and latch mechanism for refuse containerExpiredMay 06, 85May 19, 87[E05F]
4606430 Rail mounted safety restraint deviceExpiredOct 04, 85Aug 19, 86[A62B]
4571981 Spike straightening apparatusExpiredMar 15, 84Feb 25, 86[B21J, B21D]
4534296 Rail gaugerExpiredApr 29, 83Aug 13, 85[E01B]
4522127 Railway tie plug driving apparatusExpiredMar 07, 83Jun 11, 85[E01B]
4457060 Rail anchor removerExpiredJul 09, 82Jul 03, 84[B23P]
4407072 Thin flange and loose wheel detection systemExpiredNov 13, 81Oct 04, 83[B61K, B61L]
4361825 Automatic train-line air brake pressure monitoring systemExpiredMay 16, 80Nov 30, 82[B60Q]
4224876 Cup-shaped bolster bearingExpiredOct 12, 78Sep 30, 80[B61F, F16C]
4203493 Railway ballast cleaning apparatusExpiredNov 21, 78May 20, 80[E01B]

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