Belorussky Politekhnichesky Institute

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5064521 Apparatus for electrochemical machiningExpiredJul 24, 90Nov 12, 91[B23H]
5028304 Method of electrochemical machining of articles made of conducting materialsExpiredJun 15, 90Jul 02, 91[B23H, C25F]
4977707 Device for external magnetic abrasive machining of cylindrical componentsExpiredJan 05, 89Dec 18, 90[B21B]
4835470 Magnetizer having a main electromagnet and leakage flux reducing auxiliary electromagnets for magnetographic inspectionExpiredFeb 25, 87May 30, 89[G01N, H01F]
4806862 Method of magnetographic inspection of quality of materialsExpiredAug 11, 86Feb 21, 89[G01N, G01R]
4799919 Cogged belt with reinforcing membersExpiredMay 04, 87Jan 24, 89[F16G]
4786273 Cogged belt with reinforcing membersExpiredMay 11, 87Nov 22, 88[F16G]
4770016 Method of wire straightening and a wire straightening machine for carrying out the methodExpiredNov 12, 86Sep 13, 88[B21D]
4743849 Magnetizing device for recording flaw fields in the process of magnetographic inspectionExpiredApr 28, 86May 10, 88[G01N, H01F]
4686007 Method of thermally decomposing polymeric materialExpiredJul 17, 85Aug 11, 87[C07C, C10B]
4620432 Device for manufacturing microwireExpiredMay 31, 85Nov 04, 86[B21B]
4599880 Method of making metal fibers and apparatus for effecting sameExpiredNov 10, 83Jul 15, 86[B21H]
4552621 Apparatus for thermal decomposition of polymeric materialsExpiredJun 17, 83Nov 12, 85[C10B]
4545229 Method for manufacturing microwire and device for effecting sameExpiredSep 03, 81Oct 08, 85[B21B]
4400495 Wood modifying compositionExpiredAug 26, 81Aug 23, 83[C08K]

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