Estel Hoesch Werke Aktiengesellschaft

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4579273 Welded pipe connectionExpiredJan 27, 82Apr 01, 86[B23K]
4509295 Controlled grinding of rollers for elimination of cracksExpiredMar 18, 82Apr 09, 85[B24B]
4507021 Profile element for mining applicationsExpiredJun 16, 83Mar 26, 85[E21D]
4458959 Light-weight large-diameter antifriction bearingExpiredJun 27, 83Jul 10, 84[F16C]
4440363 Landing mat or the likeExpiredOct 01, 81Apr 03, 84[B64F]
4432111 Procedure for washing clothesExpiredJun 29, 81Feb 21, 84[D06F]
4424695 Arrangement for fabricating double conical springsExpiredNov 12, 80Jan 10, 84[B21F]
4420960 Arrangement for hot-rolling of metal workpiecesExpiredMay 05, 81Dec 20, 83[B21B]
4411152 Method and apparatus for testing pipesExpiredJul 28, 81Oct 25, 83[G01M]
4382374 Method of, and apparatus for, effecting temperature-equalization of hot steel stripExpiredFeb 09, 81May 10, 83[B21B]
4368932 Sheet-metal ring mount for anti-friction bearingExpiredApr 22, 81Jan 18, 83[F16C]
4339077 Rail mounting systemExpiredOct 02, 80Jul 13, 82[E01B]
4337662 Electrodynamic sound converterExpiredNov 20, 80Jul 06, 82[G01N]
4327900 Cooling element for a metallurgical furnaceExpiredSep 08, 80May 04, 82[C21B]
4308793 Apparatus for stamping indicia on workpieces moving in a pathExpiredDec 05, 79Jan 05, 82[B41F]
4307282 Method of and arrangement for applying indicia to a surface of a moving workpieceExpiredDec 05, 79Dec 22, 81[B23K, G01D]
4304981 Method for identifying or marking panels and stripsExpiredNov 05, 79Dec 08, 81[B23K]

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