JOY POWER PRODUCTS, INC., A CORP. OF PA

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4561472 Sliding blade closure apparatus with inflatable sealing ringExpiredMar 20, 84Dec 31, 85[F16K]
4491144 Flexible seals for sliding blade dampersExpiredJul 08, 83Jan 01, 85[F16K]
4474205 Sliding blade apparatus for closing conduitsExpiredMar 20, 84Oct 02, 84[F16K]
4367792 Surface condenserExpiredAug 18, 80Jan 11, 83[F28B]
4344480 Support for heat exchange tubesExpiredJun 27, 80Aug 17, 82[F28F]
4334550 Sealing means for sliding gate valveExpiredDec 10, 75Jun 15, 82[F16K]
4320566 Method of retrofitting a heat exchangerExpiredJun 02, 80Mar 23, 82[B23P]
4255841 Condenser construction with delayed tube bundlesExpiredAug 20, 79Mar 17, 81[B23P, B01J, B21D]
4252182 Tube sheet shieldExpiredMar 20, 79Feb 24, 81[F28F]
4236575 Tube bundle support plateExpiredSep 24, 79Dec 02, 80[F28B, F28F]
4214883 Liquid-gas separatorExpiredFeb 12, 79Jul 29, 80[B01D]
4210202 Support for heat exchange tubesExpiredMar 30, 78Jul 01, 80[F28F]
4199898 Closure apparatus with snap-in seal stripsExpiredMar 26, 79Apr 29, 80[E06B]
4194671 Method for constructing a steam condenserExpiredJun 06, 78Mar 25, 80[B23P, B23K]

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