OY WARTSILA AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5007117 Vacuum toilet system with simultaneous rinse and dischargeExpiredDec 21, 88Apr 16, 91[E03D]
5002592 Waste tank for a vacuum sewage systemExpiredApr 04, 89Mar 26, 91[B01D]
4889071 Upstreams inclined doctor bladeExpiredMay 04, 87Dec 26, 89[B05C]
4865631 Vacuum sewage systemExpiredFeb 26, 88Sep 12, 89[B01D]
D302238 Key or similar articleExpiredNov 06, 87Jul 18, 89[]
4811754 Rinse water valve for vacuum toilet systemExpiredMar 06, 87Mar 14, 89[F16K]
4791949 Method of discharging sewage by vacuum and control apparatus for carrying the method into effectExpiredAug 24, 87Dec 20, 88[E03F]
4704047 Land drainage systemExpiredApr 23, 86Nov 03, 87[E02B]
4691955 Rigid place matExpiredJun 18, 86Sep 08, 87[B65D]
4663809 Deflection control in a rollExpiredApr 24, 81May 12, 87[F16C, B30B]
4658753 Roll blade assembly for a paper coating machineExpiredJun 26, 85Apr 21, 87[B05C]
4651942 WinderExpiredJun 19, 85Mar 24, 87[B65H]
4648342 Arrangement in vesselsExpiredOct 11, 85Mar 10, 87[B63B]
4641392 Multipurpose cleaning and transportation systemExpiredAug 05, 85Feb 10, 87[A47L]
4621379 Flushing operating means for vacuum toiletExpiredJan 07, 85Nov 11, 86[E03D]
4603709 Device in a vacuum transportation system for liquids, preferably a vacuum sewage systemExpiredFeb 06, 85Aug 05, 86[F16K]
4597326 Roller pressExpiredSep 07, 84Jul 01, 86[B30B]
4596291 Floating drilling platformExpiredJun 10, 83Jun 24, 86[B63B]
4592155 Dredger with transport basin having loading and unloading mechanismExpiredSep 10, 84Jun 03, 86[E02F]
4591015 Wheel propulsion device for air cushion vehicleExpiredOct 12, 83May 27, 86[B60V]

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