ALSTOM HOLDINGS

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H01H ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES 391
 
  
 
B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING 155
 
  
 
H02B BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER 134

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6180907 Limiter device for a high voltage circuit breaker having a grounded metal tankJun 17, 99Jan 30, 01[H01H]
5216214 High- and medium-voltage gas blast circuit breakerMay 21, 92Jun 01, 93[H01H]
5216574 Component for a metal-clad station for section switching and groundingJul 22, 92Jun 01, 93[H02B]
5201207 Method of manufacturing a thimble of contact fingers, and a thimble made by the methodMay 08, 92Apr 13, 93[B21D]
5151567 Circuit breaker control apparatusSep 10, 91Sep 29, 92[H01H]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6679535 Safety wheel, method of manufacturing such a wheel and bogie equipped with such a wheelExpiredNov 19, 99Jan 20, 04[B60B]
6581462 Method and a device for detecting an internal arc in a metal-clad electrical linkExpiredJul 01, 02Jun 24, 03[G01R]
6481280 Method and a device for detecting an internal arc in a metal-clad electrical linkExpiredNov 23, 99Nov 19, 02[G01R]
6332648 Motion rotating seat particularly for a railway vehicleExpiredNov 12, 99Dec 25, 01[B60N]
6328145 Impact damping structureExpiredSep 28, 99Dec 11, 01[B16F]
6302483 Revolving seat, in particular for a rail vehicleExpiredNov 12, 99Oct 16, 01[A47C]
6284993 Ball-locked mechanism for inserting a closure resistorExpiredNov 29, 99Sep 04, 01[H01H]
6279486 Device for damping the transverse and hunting movements of a vehicle, and vehicle provided with such a deviceExpiredOct 06, 99Aug 28, 01[B61F]
6236548 Method of discriminating between an internal arc and a circuit-breaking arc in a medium or high voltage circuit breakerExpiredSep 14, 99May 22, 01[H02H]
6215684 Feed-through for high and medium voltage stationExpiredFeb 02, 00Apr 10, 01[H02M, G01R]
6172172 Polyolefin compositions and blown films obtained therefromExpiredNov 10, 99Jan 09, 01[C08F, C08L]
5321221 Self-disconnecting circuit-breaker for medium tension, and use thereof in a medium-tension station or bayExpiredNov 17, 92Jun 14, 94[H01H]
5305961 Method of winding an electrical coil as successive oblique layers of coil turnsExpiredJun 12, 92Apr 26, 94[H01F]
5295207 Optical apparatus for measuring current in a grounded metal-clad installationExpiredNov 16, 92Mar 15, 94[G01R]
5276285 High rupture capacity circuit-breakerExpiredMay 15, 92Jan 04, 94[H01H]
5264671 Varistor inserter device for a high-voltage circuit-breakerExpiredMay 21, 92Nov 23, 93[H01H]
4996398 Medium tension circuit breaking having high nominal currentExpiredMay 21, 90Feb 26, 91[H01H]
4983789 High- and medium-voltage gas circuit breakersExpiredJan 02, 90Jan 08, 91[H01H]
4943765 Circuit for measuring voltages in a three-phase installation, in particular an installation of the metalclad typeExpiredAug 31, 89Jul 24, 90[G01R, H02H]

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