AE PLC

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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Expired/Abandoned/Withdrawn Patents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
5743012 Piston and piston ringExpiredAug 16, 93Apr 28, 98[B23P]
5335711 Process and apparatus for metal castingExpiredApr 29, 92Aug 09, 94[B22D]
5096581 Centrifugal oil filterExpiredJun 30, 89Mar 17, 92[B01D]
5009124 Wrist pinExpiredFeb 27, 90Apr 23, 91[F16C]
5001965 Piston and piston ringExpiredFeb 26, 88Mar 26, 91[F16J]
4939984 Investment-cast piston crown cap with encapsulated non-metallic insulating coreExpiredJun 01, 88Jul 10, 90[F02F, F16J]
4936173 Machine toolsExpiredMar 16, 87Jun 26, 90[B23B]
4928578 Pistons with bearing membersExpiredNov 23, 87May 29, 90[F22B, F16J]
4921734 Cylinder linersExpiredMay 11, 88May 01, 90[F02B, F02F, F16J]
4876947 Pistons with bearing landsExpiredMar 19, 87Oct 31, 89[F22B, F16J]
4871458 Centrifugal filtersExpiredApr 29, 88Oct 03, 89[B01D]
4864985 Rotary valveExpiredApr 20, 88Sep 12, 89[F01L]
4865922 Plain bearingExpiredJul 23, 87Sep 12, 89[B22F, B32B]
4841927 Ceramic cylindersExpiredFeb 10, 88Jun 27, 89[F01F]
4838149 PistonsExpiredSep 15, 87Jun 13, 89[F16J]
4831919 Asymmetric oval piston with higher convexity thrust faceExpiredJul 07, 86May 23, 89[F02F, F16J]
4830719 Method for etching piston ringsExpiredJun 22, 88May 16, 89[C25F]
4817505 Piston with stiffening structure for lower skirt regionsExpiredJun 19, 87Apr 04, 89[F16J]
4817007 Machine tool control systemsExpiredFeb 24, 87Mar 28, 89[G05B]
4809591 Pistons with oil retaining depressionsExpiredMar 18, 88Mar 07, 89[F01B]

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