Big River Zinc Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6652676 Zinc alloy containing a bismuth-indium intermetallic compound for use in alkaline batteriesExpiredOct 18, 99Nov 25, 03[C22C]
4666474 Electrostatic precipitatorsExpiredAug 11, 86May 19, 87[B03C]
4614543 Mixed lixiviant for separate recovery of zinc and lead from iron-containing waste materialsExpiredJan 31, 85Sep 30, 86[C22B]
4610721 Two-stage leaching process for steel plant dustsExpiredJan 31, 85Sep 09, 86[C22B]
4610722 Process for metal recovery from steel plant dustExpiredJan 31, 85Sep 09, 86[C01G]
4605435 Recycling of steel plant dusts to steel furnacesExpiredJan 31, 85Aug 12, 86[C22B]
4572771 Zinc recovery from steel plant dusts and other zinciferous materialsExpiredJan 31, 85Feb 25, 86[C25B]
4552629 Electrogalvanizing utilizing primary and secondary zinc sourcesExpiredJan 31, 85Nov 12, 85[C25C]

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