A-Betong AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4621787 Prestressable passage coreExpiredMay 03, 84Nov 11, 86[B28B]
4522367 Matrix array for manufacturing concrete sleeper blocksExpiredSep 12, 84Jun 11, 85[B28B]
4495127 Method of manufacturing concrete sleeper blocksExpiredMar 15, 83Jan 22, 85[B28B]
4481293 Method for the production of methaneExpiredJul 19, 82Nov 06, 84[C12P]
4471936 Mould core for casting concrete elementsExpiredFeb 10, 82Sep 18, 84[B22C]
4415120 Device for sleepers for railway tracksExpiredJan 27, 81Nov 15, 83[E01C]
4356269 Plant for the production of methaneExpiredNov 06, 79Oct 26, 82[C12M]
4336906 Arrangement by crossings between roads and railwaysExpiredDec 20, 79Jun 29, 82[E01B]
4332118 Method and support for angularly adjusting a building elementExpiredApr 29, 80Jun 01, 82[E04B]
4290991 Method of manufacturing concrete sleeper blocks and a matrix array for carrying out the methodExpiredNov 19, 79Sep 22, 81[B28B]
4236670 Arrangement at a railroad crossingExpiredOct 04, 78Dec 02, 80[E01C]
4201711 Method of manufacturing prestressed construction elements in a long mould bedExpiredApr 27, 78May 06, 80[B28B]

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