Clayton Dewandre Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5113652 Diesel engine exhaust systemExpiredOct 19, 90May 19, 92[F01N]
5007455 Pilot-operated hydraulic antilock modulatorExpiredFeb 15, 89Apr 16, 91[F15B]
4911615 Hydraulic pump unloaderExpiredJan 24, 89Mar 27, 90[F04B]
4875742 Solenoid operated hydraulic control valveExpiredApr 22, 88Oct 24, 89[F16K, B60T]
4866938 Master cylinder piston with floating sealing ring recuperation valveExpiredJan 22, 88Sep 19, 89[B60T, F15B]
4821518 Clutch booster with overcenter meansExpiredNov 05, 87Apr 18, 89[F15B, F01B]
4525128 Reciprocating exhausterExpiredJun 09, 83Jun 25, 85[F04B]
4486053 Solenoid operated valvesExpiredOct 28, 81Dec 04, 84[B60T]
4343517 Hydraulic braking systems for tractor-trailer combinationsExpiredFeb 22, 80Aug 10, 82[B60T]
4285364 Hose couplingExpiredMay 21, 80Aug 25, 81[F16L]
4275643 Hydraulic control systemsExpiredAug 24, 79Jun 30, 81[F15B]
4260197 Spool type brake valvesExpiredMay 11, 78Apr 07, 81[B60T]
4239293 Vehicle braking system with valving to control spring applied brakes and fluid actuated service brake unitsExpiredMar 20, 79Dec 16, 80[B60T]
4236761 Dual circuit braking system employing single load sensing valve in one circuit and relay valve in other circuitExpiredNov 24, 78Dec 02, 80[B60T]
4236762 Full power hydraulic braking systems for tractor-trailer combinationsExpiredDec 04, 78Dec 02, 80[B60T]

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