DENVER EQUIPMENT COMPANY A CORP. OF DELAWARE

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4750274 Sludge processingExpiredJan 27, 87Jun 14, 88[F26B]
4535326 Liner deterioration warning for fluid moversExpiredJul 21, 82Aug 13, 85[G08B, F01B]
4519715 PropellerExpiredNov 17, 83May 28, 85[B01F]
4482253 Rotary material processorExpiredMar 28, 83Nov 13, 84[B01F]
4421151 Tire-pressure regulating systemExpiredMar 04, 82Dec 20, 83[B60C]
4408944 Conveyor for removal of bed drain material from a coal-burning fluidized bed combustorExpiredNov 07, 80Oct 11, 83[F23J]
4401645 Lime slaking methodExpiredJun 01, 82Aug 30, 83[C01F]
4297208 Inclined helical flight conveyorExpiredNov 14, 80Oct 27, 81[B01D]
4261953 Lime slaking apparatusExpiredFeb 28, 79Apr 14, 81[C04B, B01F]
4251376 FilterExpiredMar 01, 79Feb 17, 81[B01D]

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