Met-Tech Systems Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR392
 
  
 
C22B PRODUCTION OR REFINING OF METALS 325
 
  
 
C21B MANUFACTURE OF IRON OR STEEL 221

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5487842 Metal extractant solution comprising N-ethyl hydroxamic acid chelants and kerosene solventJul 11, 94Jan 30, 96[C09K, C22B, C21B]
5328626 N-ethyl hydroxamic acid chelantsMay 29, 92Jul 12, 94[C09K, C22B, C21B]
5174917 Compositions containing n-ethyl hydroxamic acid chelantsJul 19, 91Dec 29, 92[C09K, C22B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5030427 Gallium purificationExpiredMay 26, 88Jul 09, 91[C22B]
4975253 Solvent extraction of nickel using hydroxamic acidsExpiredOct 16, 89Dec 04, 90[C22B]
4943646 Gallium complexes and solvent extraction of galliumExpiredNov 23, 87Jul 24, 90[C07F]
4939299 Succinyl dihydroxamic acidsExpiredJul 06, 89Jul 03, 90[C07C]
4882132 Solvent extraction of cobalt using hydroxamic acidsExpiredJan 20, 87Nov 21, 89[C01G]
4759917 Oxidative dissolution of gallium arsenide and separation of gallium from arsenicExpiredFeb 24, 87Jul 26, 88[C01G, C01F]
4741887 Gallium complexes and solvent extraction of galliumExpiredDec 04, 86May 03, 88[C22B]

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