Pechine Ugine Kuhlmann

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4518569 Process for cleaning the inner walls of a reactorExpiredMar 18, 80May 21, 85[C01G]
4511540 Exploitation of copper, nickel and cobalt by treating manganiferous matrix oxidized oresExpiredOct 26, 81Apr 16, 85[C01G]
4443306 Process and cell for the preparation of polyvalent metals such as Zr or Hf by electrolysis of molten halidesExpiredNov 16, 81Apr 17, 84[C25C]
4396472 Novel apparatus and process for the TiCl.sub.4 feed to electrolysis cells for the preparation of titaniumExpiredOct 20, 81Aug 02, 83[C25C]
4392924 Process for controlling the permeability of diaphragms in the preparation of polyvalent metals by electrolysis and an electrolysis cell for carrying out the processExpiredOct 20, 81Jul 12, 83[C25C]
4381976 Process for the preparation of titanium by electrolysisExpiredOct 20, 81May 03, 83[C25C]
4345583 Water heater using solar and non-solar energyExpiredAug 21, 79Aug 24, 82[F24J, G05D]
4319935 Superplastic metal alloys having a high deformation rateExpiredJan 08, 80Mar 16, 82[C22C]
4309982 Process and apparatus for the preparation of hot water from solar energyExpiredApr 10, 79Jan 12, 82[F24J, E03B, F24D]
4276327 Process for depositing alumina onto a substrate and alumina regenerationExpiredNov 24, 76Jun 30, 81[B05D]

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