U.S. Filter/Ionpure, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5108624 Method for deoxygenating a liquidExpiredMar 12, 90Apr 28, 92[C02F]
4749640 Integrated circuit manufacturing processExpiredSep 02, 86Jun 07, 88[G03C]
4687561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutionsExpiredMay 20, 85Aug 18, 87[B01D]
4574049 Reverse osmosis systemExpiredJun 04, 84Mar 04, 86[B01D]
4532045 Bleed-off elimination system and methodExpiredJul 07, 82Jul 30, 85[B01D]

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