Brown, Boveri & Cie AG

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5153695 Semiconductor gate-controlled high-power capability bipolar deviceExpiredSep 10, 90Oct 06, 92[H01L]
5128314 Fiber bundle and method for producing the sameExpiredDec 21, 89Jul 07, 92[B32B]
5093693 PN-junction with guard ringExpiredJan 28, 91Mar 03, 92[H01L]
5078571 Multi-cylinder steam turbineExpiredDec 20, 90Jan 07, 92[F01D]
5057440 Manufacturing gate turn-off thyristor having the cathode produced in two diffusion stepsExpiredAug 16, 89Oct 15, 91[H01L]
5051322 Thermal insulationExpiredJul 10, 86Sep 24, 91[H01M]
5034899 Software tool for automatically generating a functional-diagram graphicExpiredNov 27, 89Jul 23, 91[G06F]
4997348 Spiral rotary piston displacement machine with advanced inlet sealing lineExpiredMay 29, 90Mar 05, 91[F04C]
4996117 High temperature protective coatingExpiredSep 25, 89Feb 26, 91[C04B, B32B]
4983574 Composite superconductorExpiredJul 20, 88Jan 08, 91[H01B]
4973806 Compressed-air breakerExpiredOct 25, 88Nov 27, 90[H01H]
4971839 High-temperature shielding coating and method for producing itExpiredOct 06, 88Nov 20, 90[B05D, C09D]
4972249 Semiconductor component increasing the breakdown voltageExpiredMar 31, 89Nov 20, 90[H01L]
4970576 Power semiconductor module and method for producing the moduleExpiredMay 19, 88Nov 13, 90[H05K]
4952990 Gate turn-off power semiconductor componentExpiredMar 06, 89Aug 28, 90[H01L]
4953004 Housing for a gate turn-off power thyristor (GTO)ExpiredDec 14, 88Aug 28, 90[H01L]
4950138 Spiral displacement machine with flexible eccentric guide arrangementExpiredDec 12, 88Aug 21, 90[F04C]
4944807 Process for chemically stripping a surface-protection layer with a high chromium content from the main body of a component composed of a nickel-based or cobalt-based superalloyExpiredNov 30, 88Jul 31, 90[C23G]
4943926 Method for the analysis and synthesis of binary signalsExpiredOct 09, 86Jul 24, 90[H04L, G06F]
4943990 Therapy simulatorExpiredDec 06, 88Jul 24, 90[G21K]

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