TURBINE ENGINE COMPONENTS TEXTRON INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4999093 Electrochemical machine electrode assemblyExpiredMay 01, 89Mar 12, 91[B23H]
4797189 Pressure balanced sealing pistons for cathodes in an electrolyte chamberExpiredDec 11, 87Jan 10, 89[B23H]
4761214 ECM machine with mechanisms for venting and clamping a workpart shroudExpiredMar 23, 87Aug 02, 88[B23H]
4756812 Electrical connector and clamp mechanism for ECM workpart shaftExpiredApr 13, 87Jul 12, 88[B23H]
4752366 Partially conductive cathode for electrochemical machiningExpiredNov 12, 85Jun 21, 88[B23H]
4686020 Method of electrochemical machining bladed rotorsExpiredNov 27, 85Aug 11, 87[B23H]
4663011 Multi-axis ECM machine useful for machining airfoils of rotorsExpiredNov 27, 85May 05, 87[B23H]
4657645 ECM machine with workpart shroud and arbor assemblyExpiredNov 27, 85Apr 14, 87[B23H]
4657649 ECM machine with skewed workpart and pocketed cathodesExpiredNov 27, 85Apr 14, 87[B23H]

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