DOUWE EGBERTS KONINKLIJKE TABAKSFABRIEK-KOFFIEBRANDERIJEN-THEEHANDEL N.V.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5153796 Method and apparatus for transferring information between two magnetic bodies using a third body of magnetic materialExpiredAug 06, 87Oct 06, 92[G11B]
4924908 Apparatus for withdrawing liquid from a reservoir by means of a water jet deviceExpiredJan 19, 89May 15, 90[B01F, B67D]
4877631 Process for recovering caffeine absorbed in activated carbon, and a process for decaffeinating coffeeExpiredJun 01, 87Oct 31, 89[C07D, A23F]
4871532 Mouth care productsExpiredJan 07, 88Oct 03, 89[A61K]
4860645 Disposable filter cartridge, whether or not combined with a water reservoirExpiredNov 10, 86Aug 29, 89[A47J]
4818552 Process for recovering caffeine adsorbed to activated carbonExpiredAug 06, 87Apr 04, 89[C07D, A23F]
4656866 Method of measuring the pressure in a vacuum packageExpiredApr 09, 85Apr 14, 87[G01M]
4653252 Packing method and a blank for use thereinExpiredJan 22, 85Mar 31, 87[B65B]
4508553 Process for countercurrent crystallization with recirculationExpiredJul 20, 81Apr 02, 85[B01D]
4495211 Process for the decaffeination of green coffee beansExpiredOct 14, 82Jan 22, 85[A23F]
4491462 Continuous packed bed wash columnExpiredOct 26, 83Jan 01, 85[B01D]
4481169 Washing columnExpiredDec 27, 82Nov 06, 84[B01J]
4475355 Continuous packed bed wash columnExpiredSep 16, 82Oct 09, 84[B01D]
4401239 Transport and dispensing container for liquid materialExpiredJun 05, 81Aug 30, 83[B65D]
4332599 Continuous packed bed wash columnExpiredJun 08, 79Jun 01, 82[B01D]

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