NORTHWEST ALUMINUM TECHNOLOGIES

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
C25C PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR 118

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6,558,525 Anode for use in aluminum producing electrolytic cellMar 01, 02May 06, 03[C25C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2007/0278,107 Anode for use in aluminum producing electrolytic cellABANMay 30, 06Dec 06, 07[C25C, C25B]
7,077,945 Cu--Ni--Fe anode for use in aluminum producing electrolytic cellExpiredMay 08, 03Jul 18, 06[C25C]
6,866,768 Electrolytic cell for production of aluminum from aluminaExpiredMar 14, 03Mar 15, 05[C25C]
6,837,982 Maintaining molten salt electrolyte concentration in aluminum-producing electrolytic cellExpiredJan 25, 02Jan 04, 05[C25C]
6,811,676 Electrolytic cell for production of aluminum from aluminaExpiredJul 16, 02Nov 02, 04[C25C]
6,800,191 Electrolytic cell for producing aluminum employing planar anodesExpiredMar 15, 02Oct 05, 04[C25C]
6,719,889 Cathode for aluminum producing electrolytic cellExpiredApr 22, 02Apr 13, 04[B25D, C25C]
6,719,890 Cathode for a hall-heroult type electrolytic cell for producing aluminumExpiredApr 22, 02Apr 13, 04[C25C]
2003/0057,102 Temperature control for low temperature reduction cellABANSep 24, 01Mar 27, 03[C25C]
6,497,807 Electrolyte treatment for aluminum reductionExpiredNov 25, 00Dec 24, 02[C25C]
6,485,628 Bath for electrolytic reduction of alumina and method thereforExpiredNov 25, 00Nov 26, 02[C25C]
6,436,272 Low temperature aluminum reduction cell using hollow cathodeExpiredOct 04, 00Aug 20, 02[C25C]
6,419,812 Aluminum low temperature smelting cell metal collectionExpiredNov 27, 00Jul 16, 02[C25C]
6,419,813 Cathode connector for aluminum low temperature smelting cellExpiredNov 25, 00Jul 16, 02[C25C]
6,379,512 Combination for electrolytic reduction of aluminaExpiredNov 25, 00Apr 30, 02[C25C, C25B]
6,258,247 Bath for electrolytic reduction of alumina and method thereforExpiredFeb 09, 99Jul 10, 01[C25C]

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