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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4471642 Replacement stand for rolling millExpiredJan 26, 82Sep 18, 84[B21B]
4442229 Regeneration of ion exchange materialsExpiredFeb 22, 83Apr 10, 84[B01J]
4417911 Manufacture of optical fibre preformsExpiredFeb 23, 82Nov 29, 83[C03B]
4405968 Control circuitsExpiredMay 12, 82Sep 20, 83[H01H]
4344525 Scraper deviceExpiredAug 13, 80Aug 17, 82[B65G]
4338876 Application of liquids to textilesExpiredJul 02, 80Jul 13, 82[D06B]
4325400 Fluid flow equalizing valve arrangementExpiredDec 05, 79Apr 20, 82[F15B]

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