Pfeifer & Langen

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6447822 Method for preparing and using B-starchExpiredSep 21, 00Sep 10, 02[A21D]
4935360 Process for the microbial anaerobic production of acetic acidExpiredJun 01, 87Jun 19, 90[C12R, C12P]
4927756 Water soluble iron dextran and a process for its manufactureExpiredFeb 25, 88May 22, 90[C07G, C12P, C08B]
4910142 Cell culture microcarrier, method for preparing same and use thereof for cultivating anchorage-dependent cellsExpiredJan 04, 89Mar 20, 90[C12N, C08B]
4824946 Cell culture microcarrier, method for preparing same and use thereof for cultivating anchorage-dependent cellsExpiredJan 14, 85Apr 25, 89[C12B, C12N, C08B]
4749695 Water soluble iron dextran and a process for its manufactureExpiredJun 05, 85Jun 07, 88[A61K, C08B]
4693974 Processes for producing leucroseExpiredSep 29, 86Sep 15, 87[C12P, A23L, A23G]
4673643 Process for the manufacture of iso-malto-oligosaccharide monovalent haptensExpiredJun 11, 85Jun 16, 87[C12P]
4651715 Method for an equipment for making dry products from sugar syrupExpiredFeb 27, 85Mar 24, 87[F24C]
4649058 Gluco-oligosaccharide mixture and a process for its manufactureExpiredJun 05, 85Mar 10, 87[A23L, C12D]
4627880 Unprocessed complete cane sugar and method of producing itExpiredFeb 27, 85Dec 09, 86[F24C]

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