Water Refining Company, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4568465 Water treatment system and control thereforExpiredMar 25, 85Feb 04, 86[C02B]
D274929 Combined water treatment and storage unitExpiredApr 21, 83Jul 31, 84[]
4426285 Water softening and treatment systemExpiredJun 28, 82Jan 17, 84[B01D]
4416773 Valve mechanism for multiple distributor fluid treatment systemExpiredFeb 22, 82Nov 22, 83[B01D]
4387021 System for handling exhausted vermiculite cation exchange materialsExpiredApr 06, 81Jun 07, 83[B01J]
4385357 Water treatment system and control thereforExpiredApr 14, 78May 24, 83[G02F]
4347132 Reverse osmosis expansible pressurized permeate storage having permeate and concentrate controlsExpiredFeb 17, 81Aug 31, 82[B01D]
4343699 Convertible dual container storage systemExpiredMay 19, 80Aug 10, 82[B01D]
4329225 Mixed bed deionizerExpiredDec 29, 80May 11, 82[B01J]
4289617 Water softening and reverse osmosis systemExpiredMay 05, 80Sep 15, 81[C02F]
4235715 Process for removing alkalinity and hardness from watersExpiredFeb 16, 79Nov 25, 80[B01J, B01D]
4217011 Water softener cabinetExpiredNov 28, 78Aug 12, 80[A47B, B65D]
4207397 Method for recovering and treating brine from water softener regenerationExpiredSep 15, 78Jun 10, 80[B01D]

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