Rilett Engergitjanst AB

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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Expired/Abandoned/Withdrawn Patents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
4558733 Heat exchanger having intermittently movable rotational cleaning armsExpiredDec 08, 81Dec 17, 85[F28G]
4372761 Scrubber for cleaning dust-loaded gas and steamExpiredMar 10, 81Feb 08, 83[B01D]

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