WEIRTON STEEL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2001/0009,718 Polymeric coated metal strip and method for producing sameAbandonedJan 23, 01Jul 26, 01[B29C, B32B]
5861215 Light-gage composite-coated flat-rolled steel manufacture and productExpiredJul 03, 97Jan 19, 99[B32B]
5689992 Draw-processing of can bodies for sanitary can packsExpiredNov 22, 96Nov 25, 97[B21D]
5674633 Light-gage composite-coated flat-rolled steel manufacture and productExpiredApr 06, 95Oct 07, 97[B32B]
5413645 Light-cage composite-coated flat-rolled steel manufacture and productExpiredApr 19, 93May 09, 95[B21D, B65D]
5347839 Draw-process methods, systems and tooling for fabricating one-piece can bodiesExpiredApr 27, 93Sep 20, 94[B21D]
5346607 Electrolytic tinplating and productExpiredSep 30, 92Sep 13, 94[C25D]
5084358 Composite-coated flat-rolled sheet metal manufacture and productExpiredMar 03, 89Jan 28, 92[B32B]
5038956 Abuse resistant, safety-edge, controlled-opening convenience-feature end closuresExpiredApr 26, 89Aug 13, 91[B65D]
5014536 Method and apparatus for drawing sheet metal can stockExpiredFeb 21, 86May 14, 91[B21D]
4974439 Controlled transfer of sheet metal can bodies in can body lineExpiredJul 01, 88Dec 04, 90[B21D]
4952461 Composite-coated flat-rolled steel can stock and can productExpiredSep 21, 88Aug 28, 90[B05D, B32B]
4947579 Computer operated automatic seedling plant transplanting machineExpiredOct 19, 88Aug 14, 90[A01G, A01C]
D307720 Container end closureExpiredJan 23, 87May 08, 90[]
D305303 Baby food canExpiredApr 14, 86Jan 02, 90[]
4875597 Convenience packagingExpiredDec 02, 88Oct 24, 89[B65D]
4863060 Flat-rolled steel can stock productExpiredFeb 10, 88Sep 05, 89[B65D, B32B]
4848623 Disc removal end wall structure with safety featuresExpiredJun 28, 77Jul 18, 89[B65D, B21D]
D302123 End closure for container with integral openerExpiredFeb 27, 86Jul 11, 89[]
4831960 Lubrication of cup-shaped can bodiesExpiredFeb 03, 88May 23, 89[B05D]

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