The Youngstown Steel Door Company

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4452147 Intermodal railway carExpiredMar 10, 81Jun 05, 84[B61F, B61D]
4429921 Sliding bearing and sealExpiredJan 25, 82Feb 07, 84[F16C, B61D]
4390196 Sliding door starter and closerExpiredOct 02, 81Jun 28, 83[E05C]
4377304 Door lockExpiredOct 06, 80Mar 22, 83[E05C]
4353187 Door repair method and repair section thereforExpiredNov 12, 80Oct 12, 82[E06B]
4344365 Railway hopper car gate anti-friction sealExpiredNov 01, 79Aug 17, 82[F16C, B61D]
4344366 Railway car door driverExpiredNov 28, 79Aug 17, 82[B61D, E05F]
4324188 Hopper discharge outlet and methodExpiredMar 03, 80Apr 13, 82[B61D]
4319429 Auxiliary crank endExpiredAug 25, 80Mar 16, 82[E05D]
4260046 Power wheel for folding doorsExpiredOct 27, 79Apr 07, 81[F16D]
4240357 Folding rail car doorsExpiredJan 10, 79Dec 23, 80[B65J]
4220098 Railway car door crank actuating mechanismExpiredOct 06, 77Sep 02, 80[B60J, B61D, E05D]
4211038 Roller drop doorExpiredApr 20, 78Jul 08, 80[E05D]
4210231 Power wheel for folding doorsExpiredOct 27, 78Jul 01, 80[F16D]

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