KABEL- UND METALLWERKE GUTEHOFFNUNGSHUTTE AG

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5407499 Making a mold for continuous castingExpiredApr 14, 93Apr 18, 95[C22F]
5074921 Copper alloy and methodExpiredOct 12, 90Dec 24, 91[C22F]
5018378 Mold makingExpiredMay 04, 87May 28, 91[B21C]
4883112 Method of casting and mold makingExpiredAug 05, 88Nov 28, 89[B22D]
4856947 Cutting curved mold surfacesExpiredMar 08, 88Aug 15, 89[B43L, B23C]
4814235 Use of oxygen-free copper deoxidized by boron or lithium as material for hollow sectionsExpiredSep 17, 87Mar 21, 89[C22F]
4787228 Making molds with rectangular or square-shaped cross sectionExpiredMay 12, 83Nov 29, 88[B21C, B21D]
4702299 Mold for continuous casting and method of makingExpiredNov 01, 85Oct 27, 87[B22D]
4613166 Connecting concentric tube systemsExpiredJul 13, 84Sep 23, 86[F16L]
4590782 Making of a bevel gearExpiredJul 03, 80May 27, 86[B21K]
4570680 Conduction of a chemically aggressive fluidExpiredAug 22, 80Feb 18, 86[F16L]
4531991 Heat-insulating tubingExpiredMay 24, 82Jul 30, 85[B32B]
4464425 Foamed polymeric shrink-fit objects and their process of manufactureExpiredJan 19, 81Aug 07, 84[B29D]
4435968 Apparatus for corrugating pipesExpiredJul 13, 81Mar 13, 84[B21D]
4421570 Making molds for continuous castingExpiredMar 12, 82Dec 20, 83[C22F]
4413768 Method of making a multi-bore elementExpiredNov 30, 81Nov 08, 83[B23K]
4412222 Dual polarized feed with feed hornExpiredJul 02, 81Oct 25, 83[H01Q]
4393566 Processing of copper tubingExpiredDec 30, 80Jul 19, 83[B23P, B21B]
4382585 Cooling plate for furnacesExpiredMar 03, 80May 10, 83[F27D]
4376741 Method and apparatus for continuously extruding an expandable thermoplastic resin composition onto an elongated preformExpiredMar 06, 80Mar 15, 83[B29D]

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