SHERWIN ALUMINA, L.P.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5636975 Inlet and discharge valve arrangement for a high pressure pumpExpiredApr 04, 94Jun 10, 97[F04B]
5445808 Process for preparing ultra-white alumina trihydrateExpiredJun 27, 94Aug 29, 95[C01F]
5342485 Process for preparing ultra-white alumina trihydrateExpiredAug 05, 92Aug 30, 94[D21H]

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