DEGGENDORFER WERFT UND EISENBAU GMBH

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5161605 Tubular reactor and methodExpiredOct 12, 90Nov 10, 92[F28F]
4952773 Automatic arc-welding machine operating with rod electrodes and a preferred application thereofExpiredAug 18, 89Aug 28, 90[B23K]
4657741 Reactor constructionExpiredMar 13, 85Apr 14, 87[F28D, B01J]
4616587 Locking mechanism for a self-dumping bargeExpiredJun 28, 85Oct 14, 86[B63B]
4549032 Process for producing styreneExpiredMay 23, 84Oct 22, 85[C07C]
4287375 Process of converting ethylbenzene to styrene by catalytic dehydrogenationExpiredMar 11, 80Sep 01, 81[C07C]
4182408 Multilayered tube sheet assembly for heat exchangersExpiredFeb 28, 78Jan 08, 80[F28F]

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