SOCIETE ANONYME DITE: DELLE-ALSTHOM

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4353387 Drainage deviceExpiredMay 15, 80Oct 12, 82[F16T]
4342067 Electric power substation for use at very high voltagesExpiredFeb 05, 80Jul 27, 82[H02B]
4338500 Device for switching in a resistance when a circuit breaker closes a circuitExpiredFeb 28, 80Jul 06, 82[H01H]
4330103 Earthquake protectorExpiredFeb 12, 80May 18, 82[A47B, F16M]
4323720 Set of bars for a high-tension unitExpiredApr 16, 80Apr 06, 82[H02G]
4300586 Stabilizer for stabilizing the gas pressure in an air blast circuit breakerExpiredMay 16, 80Nov 17, 81[G05D]
4295023 Gas-blast circuit-breakerExpiredJun 13, 79Oct 13, 81[H01H]
4286301 H.V. current cut-out circuitExpiredOct 12, 79Aug 25, 81[H01H]
4263490 Device for switching in closing resistors for high-voltage cut-out switchesExpiredAug 11, 78Apr 21, 81[H01H]
4246923 Safety device for a pneumo-hydraulic control circuitExpiredDec 18, 78Jan 27, 81[G05D]
4239180 Compensated force valve with two seatsExpiredFeb 07, 79Dec 16, 80[F16K]
4228331 Gas-blast valve of a gas-blast circuit-breakerExpiredFeb 07, 79Oct 14, 80[H01H]
4205209 Articulated contact fingerExpiredFeb 07, 79May 27, 80[H01H]

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