Tampella Keeler Incorporated

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5042402 Multi-sided watercooled rotary combustorExpiredAug 15, 90Aug 27, 91[F27B]
5005528 Bubbling fluid bed boiler with recycleExpiredApr 12, 90Apr 09, 91[F23G, F23D]
4494482 Animal litter compositionExpiredNov 01, 83Jan 22, 85[A01K]
4449482 Fluidized bed boilersExpiredApr 28, 82May 22, 84[F22B, F23D]
4338887 Low profile fluid bed heater or vaporizerExpiredAug 27, 80Jul 13, 82[B09B]

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