Anco Engineers, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4,952,206 Occlusion apparatus for converting a syringe into a non-reversible single use syringeExpiredMay 19, 89Aug 28, 90[A61M]
4,905,900 Water cannon apparatus for cleaning a tube bundle heat exchanger, boiler, condenser, or the likeExpiredJun 24, 88Mar 06, 90[B08B, B05B]
4,791,243 Compact device for long stroke energy absorptionExpiredFeb 04, 87Dec 13, 88[H02G, F16F]
4,773,357 Water cannon apparatus and method for cleaning a tube bundle heat exchanger, boiler, condenser, or the likeExpiredAug 29, 86Sep 27, 88[F28G, F22B]
4,700,134 Method and apparatus for determining the amount of magnetic debris adhering to the exterior of a tubeExpiredJan 10, 85Oct 13, 87[G01R, G01N]
4,699,665 Method of pressure pulse cleaning heat exchanger tubes, upper tube support plates and other areas in a nuclear steam generator and other tube bundle heat exchangersExpiredDec 26, 84Oct 13, 87[B08B]
4,655,846 Method of pressure pulse cleaning a tube bundle heat exchangerExpiredJun 06, 85Apr 07, 87[B08B]
4,645,542 Method of pressure pulse cleaning the interior of heat exchanger tubes located within a pressure vessel such as a tube bundle heat exchanger, boiler, condenser or the likeExpiredApr 26, 84Feb 24, 87[B08B]
4,560,016 Method and apparatus for measuring the weight of a vehicle while the vehicle is in motionExpiredDec 14, 83Dec 24, 85[G02B, G01G]
4,320,528 Ultrasonic cleanerExpiredJan 23, 80Mar 16, 82[G21C]

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