DOWA THERMOTECH CO., LTD.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C23C COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 893
 
  
 
C21D MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS 540
 
  
 
C22C ALLOYS 369
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178
 
  
 
F23N REGULATING OR CONTROLLING COMBUSTION 120
 
  
 
F27D DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE 124
 
  
 
F28C HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION 17
 
  
 
H01R ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS 1132
 
  
 
H05B ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR 1110

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2015/0275,346 HEAT TREATMENT APPARATUSMar 28, 14Oct 01, 15[C23C, C21D]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9783879 Nitrided steel member and manufacturing method thereofApr 17, 13Oct 10, 17[C23C, C21D, F16H, C22C]
9614300 Electrical connector and manufacturing method thereofJul 09, 14Apr 04, 17[H01R]
9598760 Nitrided steel member and manufacturing method thereofFeb 22, 12Mar 21, 17[C23C, C21D, C22C]
8262387 Atmosphere heat treatment apparatus and method of operating the sameFeb 02, 06Sep 11, 12[F28C]
7722728 Heat treatment method and heat treatment apparatusMar 29, 06May 25, 10[F23N]
7575643 Carburization treatment methodMar 28, 02Aug 18, 09[C23C, C22C]
7276204 Carburization treatment method and carburization treatment apparatusMar 28, 02Oct 02, 07[C21D]
6733600 Nitrided maraging steel and method of manufacture thereofJul 18, 01May 11, 04[C23C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2008/0073,002 Carburization treatment method and carburization treatment apparatusAbandonedSep 10, 07Mar 27, 08[C23C]
2004/0000,492 Sliding member having excellent seizure resistance and method for producing the sameAbandonedJul 01, 03Jan 01, 04[C25D]

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