Ultra-Centrifuge Nederland N.V.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5025152 Apparatus for separating isotopes of uraniumExpiredFeb 07, 89Jun 18, 91[B01D]
5011584 Method for separating a predetermined isotope of an element from a gaseous compound containing said elementExpiredAug 31, 89Apr 30, 91[B01D]
4990861 Electron accelerator of the microtron typeExpiredFeb 06, 89Feb 05, 91[H05H]
4824429 Centrifuge for separating liquidsExpiredMar 15, 88Apr 25, 89[B04B]
4769000 Centrifuge, in particular for biomedical useExpiredNov 17, 86Sep 06, 88[B04B]
4765966 Sublimation apparatusExpiredFeb 02, 87Aug 23, 88[B01D]
4748836 Method of forming a ridge in a tube memberExpiredMar 09, 87Jun 07, 88[B21D]
4746265 High-vacuum molecular pumpExpiredDec 14, 82May 24, 88[F01D]
4684317 High-vacuum molecular pumpExpiredNov 13, 84Aug 04, 87[F04B, F04D]
4270882 Molecular pump or, respectively, gas-tight sealing arrangement for a body placed in a housing and rapidly rotating about an axisExpiredDec 15, 77Jun 02, 81[F04B, F01B]
4195855 Seal for sealing flanges and other objectsExpiredApr 26, 78Apr 01, 80[F16L, B65D]
4184198 Three-phase voltage generator responsive to DC control pulsesExpiredOct 05, 76Jan 15, 80[H02M]
4182480 Centrifuge for separating helium from natural gasExpiredJun 02, 77Jan 08, 80[B04B]

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