A. O. Smith Harvestore Products, Inc.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4680980 Drive mechanismExpiredOct 03, 85Jul 21, 87[F16H]
4629062 Belt trainer apparatus for a conveyorExpiredAug 29, 83Dec 16, 86[B65G]
4610376 Bulk storage containersExpiredJan 09, 84Sep 09, 86[B67D]
4604035 Submersible pump having frangible drive connectionExpiredJan 02, 85Aug 05, 86[F04B, F16D, F03B]
4602463 Tank construction having a floor formed of interconnected panelsExpiredOct 03, 84Jul 29, 86[E04H]
4583662 Metering mechanism for a roller millExpiredJul 13, 84Apr 22, 86[B67D]
4576117 Livestock feeding apparatusExpiredJun 25, 84Mar 18, 86[A01K, B65G]
4572675 Apparatus for agitating and pumping a liquid slurryExpiredJun 21, 84Feb 25, 86[B01F]
4534461 Conveyor construction for conveying materials to an elevated locationExpiredAug 18, 82Aug 13, 85[B65G]
4511257 Pump position retainer apparatusExpiredJul 01, 83Apr 16, 85[B01F]
4487088 Sprocket construction for a zero caternary chainExpiredMar 29, 82Dec 11, 84[F16H]
4485977 Roller mill constructionExpiredAug 04, 82Dec 04, 84[B02C]
4438607 Method and apparatus for leveling a storage structureExpiredMar 29, 82Mar 27, 84[E02D]
4402648 Chopper pumpExpiredAug 31, 81Sep 06, 83[F04D]
4397726 Cathodically protected vesselExpiredOct 13, 81Aug 09, 83[C23F]
4378063 Belt conveyor for conveying granular materialExpiredApr 01, 81Mar 29, 83[B65G]
4375784 Diaphragm type breather system for sealed storage structureExpiredOct 19, 81Mar 08, 83[A01F]
4321996 Cleated belt forage conveyorExpiredSep 08, 80Mar 30, 82[B65G]

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