Hoesch Werke Aktiengesellschaft

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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Expired/Abandoned/Withdrawn Patents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
5067659 Method of treating refuse scrapExpiredAug 13, 90Nov 26, 91[B02C]
4832106 Production of castings containing steel tubesExpiredJul 27, 82May 23, 89[B22D]
4823847 Multi-layer helical seam steel pipeExpiredSep 10, 82Apr 25, 89[F16L]
4732623 Method of making high strength steel tubeExpiredJan 30, 84Mar 22, 88[C21D]
4662570 Apparatus for processing refuse to produce steel-making scrapExpiredOct 04, 85May 05, 87[B02C]
4621181 Method of manufacturing multilayer screw seam pipes and device for carrying out the methodExpiredAug 10, 84Nov 04, 86[B23K]
4579273 Welded pipe connectionExpiredJan 27, 82Apr 01, 86[B23K]
4572587 Road wheel for a track-laying vehicleExpiredDec 09, 83Feb 25, 86[B21K, B62D, B21H]
4531409 Test system for defect determination in welding seamsExpiredSep 08, 82Jul 30, 85[G01N]
4527379 Apparatus for connecting overlapping ends of a strapping band tensioned about a packageExpiredMay 26, 83Jul 09, 85[B65B]
4527454 Rotary sheet-metal trimming shearExpiredAug 24, 83Jul 09, 85[B26D, B23D]
4517695 Method and apparatus for balancing of out-of-balance forces in centrifuges or combined washing machines-spin driersExpiredOct 18, 82May 21, 85[D06F]
4516488 Support and tensioning apparatus for tensioning a strapping band about a packageExpiredMay 26, 83May 14, 85[B65B]
4487070 Automatic production control of extended work piecesExpiredAug 24, 82Dec 11, 84[G01N]
4463995 Safety mounting for large antifriction bearingsExpiredDec 16, 82Aug 07, 84[F16C]
4443045 Stabilized bearing for bogiesExpiredDec 17, 81Apr 17, 84[B61F, F16C, F16D]
4414042 Method of making high strength steel tubeExpiredDec 26, 79Nov 08, 83[C21D]
4384303 Arrangement for determining the width of rolling mill productsExpiredMar 21, 79May 17, 83[H04N]
4382374 Method of, and apparatus for, effecting temperature-equalization of hot steel stripExpiredFeb 09, 81May 10, 83[B21B]
4377746 Device for detecting surface flaws of rapidly moving sheet materialExpiredNov 20, 80Mar 22, 83[G01J, G01N]

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