VSL Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5197245 Structural wall reinforcement apparatus and methodExpiredAug 13, 90Mar 30, 93[E04B]
5133510 Column wire winding apparatusExpiredMay 14, 90Jul 28, 92[B65H]
4621943 Continuous prestressed concrete and methodExpiredOct 09, 84Nov 11, 86[E01C]
4616458 Protective apparatus for tendons in tendon tensioning anchor assembliesExpiredJul 01, 85Oct 14, 86[E04C]
4449857 Retained earth system with threaded connection between a retaining wall and soil reinforcement panelsExpiredOct 26, 81May 22, 84[E02D]
4397242 Cable driven shuttle system having guideways of different lengths and method for its useExpiredSep 28, 81Aug 09, 83[B61B]

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