Detroit Stoker Company

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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Expired/Abandoned/Withdrawn Patents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
5361892 Extended life grate barExpiredOct 06, 93Nov 08, 94[B65G]
5265543 Extended life grate barExpiredJun 22, 92Nov 30, 93[F23H, F23K]
5239935 Oscillating damper and air-swept distributorExpiredNov 19, 91Aug 31, 93[F23K]
5030054 Combination mechanical/pneumatic coal feederExpiredJun 23, 89Jul 09, 91[F23K, B65G]
5006323 Method of desulfurizing combustion gasesExpiredJun 30, 89Apr 09, 91[C01B, B01J]
4987837 Siftings removal deviceExpiredJan 02, 90Jan 29, 91[F23J]
4905613 Fuel feederExpiredSep 09, 88Mar 06, 90[F23K]
4867955 Method of desulfurizing combustion gasesExpiredJun 27, 88Sep 19, 89[C01B, B01J]
4762073 Metering feederExpiredJun 03, 87Aug 09, 88[F23K]
4718360 Metering FeederExpiredMay 05, 86Jan 12, 88[F23K]
4633849 Central feed rotary automatic ash discharge stokerExpiredNov 21, 83Jan 06, 87[F23H, F23K]
4616573 Metering feederExpiredJun 20, 85Oct 14, 86[F23K]
4602572 Metering feederExpiredJun 19, 85Jul 29, 86[F23B]
4576101 StokerExpiredFeb 27, 84Mar 18, 86[F23L]
4437452 Rotary continuous ash discharge stokerExpiredApr 11, 83Mar 20, 84[F23H]
4326469 Multi-fuel feeder distributorExpiredNov 02, 79Apr 27, 82[F23K]

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