RILEY STOKER CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5145490 Process for fixed bed coal gasificationExpiredDec 26, 91Sep 08, 92[C10J]
5143486 Flow promoter for fluidized solidsExpiredMar 01, 91Sep 01, 92[B65G]
5133780 Apparatus for fixed bed coal gasificationExpiredAug 09, 90Jul 28, 92[C10J]
4709662 Fluidized bed heat generator and method of operationExpiredJan 20, 87Dec 01, 87[F22B]
4709663 Flow control device for solid particulate materialExpiredDec 09, 86Dec 01, 87[F22B]
4517904 Furnace, burner and method for burning pulverized coalExpiredFeb 28, 84May 21, 85[F23D]
4214038 Fabric treatment compositions containing polyglycerol estersExpiredJan 22, 79Jul 22, 80[B08B, F26B, B32B]

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