Enel-Ente Nazionale per l'Energia Elettrica

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5437506 System for measuring the transfer time of a sound-wave in a gas and thereby calculating the temperature of the gasExpiredFeb 05, 93Aug 01, 95[G01K]
5386192 Apparatus for checking the contamination condition of electric insulatorsExpiredJun 11, 93Jan 31, 95[G01N]
5330733 Method for removing pollutants from a combustion gasExpiredJun 22, 92Jul 19, 94[C01C, C01B]
5155047 Method and apparatus for measuring and controlling efficiency of a combustionExpiredSep 20, 90Oct 13, 92[G01N]
5057271 Protection system for the basemat reactor containment buildings in nuclear power stationsExpiredApr 10, 90Oct 15, 91[G21C]
5038722 Fuel burner for a boilerExpiredMay 24, 90Aug 13, 91[F22B, F23C]
4754214 Method and apparatus for determining the dielectric constant of materials, in particular heater ashExpiredNov 10, 86Jun 28, 88[G01R]
4708293 Atomizer for viscous liquid fuelsExpiredJul 23, 86Nov 24, 87[B05B]

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