Institut Cerac S.A.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4853554 Starting deviceExpiredJan 22, 85Aug 01, 89[F02N]
4766963 Hand-held hammer toolExpiredApr 15, 87Aug 30, 88[B23B]
4758132 Rotary machine with motor embedded in the rotorExpiredNov 24, 86Jul 19, 88[H02K, F04B]
4665704 Combustion engine systemExpiredSep 10, 85May 19, 87[F02G]
4660891 High pressure water valveExpiredJul 02, 85Apr 28, 87[F21C]
4639645 Drive system for A.C. motorsExpiredJul 10, 85Jan 27, 87[H02P]
4601351 Electrically driven hammer machineExpiredSep 14, 83Jul 22, 86[B25D]
4570213 Static converter switch with fast recovery freewheel diodeExpiredJul 03, 84Feb 11, 86[H02M]
4550282 Method and device for controlling a brushless alternating current motorExpiredMar 09, 83Oct 29, 85[H02P]
4546282 Magnetizable core for accommodating electrical conductors in an electrical machine, and a method of manufacturing such a coreExpiredSep 27, 84Oct 08, 85[H02K]
4511312 Method of driving the impeller of a liquid pump by means of a brushless a.c. motor; and a liquid pump for carrying out the methodExpiredJun 01, 83Apr 16, 85[F04B]
4503918 Rock drilling apparatusExpiredJun 16, 83Mar 12, 85[E21B, E21C]
4492526 Compressor drive systemExpiredNov 26, 82Jan 08, 85[F04B]
4489261 Method and means for feeding electric energy to a portable power toolExpiredDec 15, 82Dec 18, 84[H02P]
4446706 Washing machineExpiredDec 15, 82May 08, 84[D06F, H02P]
4384834 Device for compacting powderExpiredFeb 05, 81May 24, 83[B29C]
4380421 Die for compaction of powderExpiredNov 03, 81Apr 19, 83[B29C, B22F, B30B]
4363451 Device for breaking a hard materialExpiredOct 23, 80Dec 14, 82[B02C]
4325895 Method of producing large objects from rapidly quenched non-equilibrium powdersExpiredJul 09, 80Apr 20, 82[B06B]
4313759 Wear resistant aluminium alloyExpiredJul 16, 80Feb 02, 82[B22F]

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