MAN GUTEHOFFNUNGSHUTTE GMBH

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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Expired/Abandoned/Withdrawn Patents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
4932211 Internal combustion engine charging unitExpiredSep 02, 88Jun 12, 90[F02B]
4926642 Internal combustion engine charging unitExpiredOct 04, 89May 22, 90[F02B]
4913064 Device for incinerating waste materialExpiredFeb 01, 89Apr 03, 90[F23G, D06F]
4909162 Installation for low-temperature carbonization of waste and impure materialsExpiredSep 09, 88Mar 20, 90[F23G, F23B]
4907932 Continuous bulk material conveyerExpiredJan 27, 89Mar 13, 90[B65G]
4867072 Multi-unit rail vehicle for commuter trafficExpiredJan 27, 89Sep 19, 89[B61C]
4852644 Tubular heat exchangerExpiredNov 30, 87Aug 01, 89[F28F]
4852996 Process for gasifying coalExpiredMay 21, 86Aug 01, 89[C10J, F02G]
4848982 Arrangement for cooling a synthetic gas in a quenching coolerExpiredApr 04, 88Jul 18, 89[C10J]
4841874 Pneumatic-spring bogieExpiredJan 20, 88Jun 27, 89[B61F]
4840145 Process and a device for cleaning inner or outer walls of vertically extending or inverted tubes of heat exchangersExpiredMay 17, 88Jun 20, 89[F22B]
4833750 Ramp section for collapsible floating bridge or ferryExpiredSep 15, 88May 30, 89[E01D]
4831969 Process and a device for cleaning inner or outer walls of vertically extending or inverted tubes of heat exchangersExpiredJun 29, 87May 23, 89[F22B]
4828161 Method and device for manufacturing thin-walled hollow bodies of concentric metal layersExpiredMay 19, 88May 09, 89[B23K]
4815399 Incinerator constructionExpiredFeb 09, 88Mar 28, 89[F23B]
4810157 Tractor for maneuvering an airplane without a tow barExpiredMar 07, 88Mar 07, 89[B64F]
4807800 Method for manufacturing thin-walled hollow bodies of concentric metal layersExpiredDec 15, 87Feb 28, 89[B23K]
4793406 Tube spacing gridExpiredSep 08, 87Dec 27, 88[F28F]
4790722 Multi-blade rotor for a windmill-type apparatusExpiredDec 17, 86Dec 13, 88[F07D, B64C]
4784220 Pipe spacing grate rod spacing holder for heat exchangersExpiredSep 08, 87Nov 15, 88[F28D, F28F]

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