Teikoku Piston Ring Co., Ltd.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS1733
 
  
 
F02F CYLINDERS, PISTONS, OR CASINGS FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES 629
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM4153
 
  
 
B22D CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 247
 
  
 
B22F WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER 250
 
  
 
B05D PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 186
 
  
 
B21H MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS 17
 
  
 
B23C MILLING 132
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
B60T VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL 172

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
8616556 Combined oil ringApr 21, 09Dec 31, 13[B60T, F02F, F16J]
8402881 Insert casting structureApr 17, 09Mar 26, 13[F16J]
8365696 Piston device for internal combustion enginesDec 18, 09Feb 05, 13[F02F]
8037860 Cylinder liner and engineJul 06, 06Oct 18, 11[F02B, F02F]
7882818 Cylinder liner and engineJul 06, 06Feb 08, 11[B23P, F02F]
7383805 Cylinder liner for insert casting and method for manufacturing thereofJan 07, 05Jun 10, 08[]
7077402 Combined oil ringDec 05, 03Jul 18, 06[F16J]
6468673 Cast iron component for enveloped casting, enveloped casting product using it, and method for producing cast iron component for enveloped castingDec 01, 00Oct 22, 02[B22D, B32B]
6325385 Piston ringJul 13, 99Dec 04, 01[F16J]
6279913 Sliding member and manufacturing method thereofJul 13, 99Aug 28, 01[F16J]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7963212 Combination of a piston and a piston ringExpiredJul 14, 08Jun 21, 11[F16J, E02F]
7717079 EngineExpiredJul 20, 07May 18, 10[C23C, F02F, F16J]
2008/0122,185 Combined oil ringAbandonedSep 13, 07May 29, 08[F02F, F16J]
2008/0007,006 Piston ring for internal combustion enginesAbandonedJun 12, 07Jan 10, 08[F02F]
2006/0075,863 Cutting machine and manufacturing system for fixed size sheetAbandonedOct 04, 05Apr 13, 06[B26D]
6951579 Sintered alloy for valve seats, valve seat and manufacturing method thereofExpiredFeb 24, 03Oct 04, 05[B22F]
2005/0081,693 Cutting machineAbandonedSep 27, 04Apr 21, 05[B26D]
6733903 Insert of pour-around die casting, rust preventive oil for insert of pour-around die casting, and method for pouring around an insertExpiredApr 23, 99May 11, 04[B22D, B21D, F02F]
6599172 Method for forming undercoating in repair painting for vehiclesExpiredJul 03, 01Jul 29, 03[B24B]
6508473 Piston ringExpiredSep 25, 00Jan 21, 03[B60T]
6454271 Combined oil ringExpiredDec 27, 00Sep 24, 02[F16J]
6372369 Hard film, sliding member covered with hard film, and manufacturing method thereofExpiredSep 13, 00Apr 16, 02[C23C, F16J]
2002/0033,579 PISTON RINGAbandonedDec 06, 99Mar 21, 02[F02F]
6283478 Piston ring structural body and method of mounting the piston ring structural bodyExpiredFeb 04, 99Sep 04, 01[F16J]
6257590 Sealing structure and method of mounting piston ring structural body for use in the sealing stuctureExpiredFeb 04, 99Jul 10, 01[F16J]
6205908 Piston equipped with piston ringExpiredFeb 04, 99Mar 27, 01[F01B]
6158407 Cylinder liner and method for its productionExpiredNov 04, 98Dec 12, 00[F16J]
6074497 Highly wear-resistant aluminum-based composite alloy and wear-resistant partsExpiredJul 22, 97Jun 13, 00[C22C]
6060182 Hard coating material, sliding member covered with hard coating material and manufacturing method thereofExpiredJun 05, 98May 09, 00[C23C, B32B, F16J]
6054225 Composite chromium plating film and sliding member covered thereofExpiredNov 10, 97Apr 25, 00[C23C, C25D, B23P, B32B]

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